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[tor-commits] [tor/master] start changelog for 0.3.1.1-alpha by sorting entries



commit 8410f47b6e7e6d87f1082c2328cc3fc209d0b2ae
Author: Nick Mathewson <nickm@xxxxxxxxxxxxxx>
Date:   Fri May 19 10:00:54 2017 -0400

    start changelog for 0.3.1.1-alpha by sorting entries
---
 ChangeLog                    | 395 ++++++++++++++++++++++++++++++++++++++++++-
 changes/17868                |   4 -
 changes/21662_21663_21664    |  12 --
 changes/21873                |   3 -
 changes/bug16706             |   3 -
 changes/bug16861             |  16 --
 changes/bug17170             |   3 -
 changes/bug17592             |  13 --
 changes/bug17604             |  15 --
 changes/bug18100             |   5 -
 changes/bug19699             |   5 -
 changes/bug20270             |   6 -
 changes/bug20341             |   3 -
 changes/bug20913             |   9 -
 changes/bug21121             |   3 -
 changes/bug21155             |   5 -
 changes/bug21293             |   5 -
 changes/bug21329             |   3 -
 changes/bug21406             |   5 -
 changes/bug21407             |   4 -
 changes/bug21439             |   7 -
 changes/bug21496             |   4 -
 changes/bug21507             |   5 -
 changes/bug21510             |   4 -
 changes/bug21540             |   4 -
 changes/bug21586             |   4 -
 changes/bug21599             |   4 -
 changes/bug21641             |   5 -
 changes/bug21654             |   4 -
 changes/bug21703             |   4 -
 changes/bug21715             |   5 -
 changes/bug21788             |   3 -
 changes/bug22042             |   7 -
 changes/bug22060             |  28 ---
 changes/bug22096             |   6 -
 changes/bug22244             |   6 -
 changes/bug22245             |   5 -
 changes/bug22246             |   6 -
 changes/bug22252             |   3 -
 changes/bug22270             |   4 -
 changes/cleanup22213         |   4 -
 changes/consdiff_21643       |   5 -
 changes/data_dir_default_doc |   3 -
 changes/fast_channel_lookup  |   2 -
 changes/faster-keccak        |   4 -
 changes/feature1922          |  11 --
 changes/feature21598         |   4 -
 changes/feature21622         |   8 -
 changes/feature22106         |  12 --
 changes/new_spooling_backend |   7 -
 changes/prop140              |  10 --
 changes/refactor_reached_eof |   5 -
 changes/storagedir           |   5 -
 changes/test21470            |   5 -
 changes/ticket13802          |   7 -
 changes/ticket21564          |   6 -
 changes/ticket21646          |   6 -
 changes/ticket21729          |   7 -
 changes/ticket21841          |   4 -
 changes/ticket21842          |   6 -
 changes/ticket21953          |   6 -
 changes/ticket4998           |   5 -
 62 files changed, 394 insertions(+), 373 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index fdf7d0c..4fb6627 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,397 @@
-Changes in version 0.3.1.1-alpha - 2017-??-??
+Changes in version 0.3.1.1-alpha - 2017-05-??
+  blurb goes here
+
+  o Major features (directory protocol):
+    - Tor relays and authorities are now able to serve clients an
+      abbreviated version of the networkstatus consensus document,
+      containing only the changes since the an older consensus document that
+      the client holds. Clients now request these documents when
+      available. When this new protocol is in use by both client and server,
+      they will use far less bandwidth (up to 94% less) to keep an up-to-date
+      consensus. Implements proposal 140; closes ticket 13339. Based
+      on work by by Daniel Martí.
+
+  o Major features (directory system):
+    - Tor's compression module now includes support for the zstd and lzma2
+      compression algorithms, if the libzstd and liblzma libraries are
+      available when Tor is compiled.  Once these features are exposed in the
+      directory module, they will enable Tor to provide better compression
+      ratios on directory documents. Part of an implementation for proposal
+      278; closes ticket 21662.
+
+  o Major features (internals):
+    - Add an ed diff/patch backend, optimized for consensus documents.
+      This backend will be the basis of our consensus diff implementation.
+      Most of the work here was done
+      by Daniel Martí. Closes ticket 21643.
+
+  o Major features (security, stability, experimental):
+    - Tor now has the optional ability to include modules written in
+      Rust.  To turn this on, pass the "--enable-rust" flag to the
+      configure script.
+      It's not time to get excited yet: currently, there is no actual
+      Rust functionality beyond some simple glue code, and a notice at
+      startup to tell you that Rust is running. Still, we hope that
+      programmers and packagers will try building with rust
+      support, so that we can find issues with the build system,
+      and solve portability issues. Closes ticket 22106.
+
+  o Major features (traffic analysis resistance):
+   - Relays and clients will now send a padding cell on idle OR
+     connections every 1.5 to 9.5 seconds (tunable via consensus
+     parameters). Directory connections and inter-relay connections
+     are not padded. Padding is negotiated using Tor's link protocol,
+     so both relays and clients must upgrade for this to take effect.
+     Clients may still send padding despite the relay's version by
+     setting ConnectionPadding 1 in torrc, and may disable padding
+     by setting ConnectionPadding 0 in torrc. Padding may be minimized
+     for mobile users with the torrc option ReducedConnectionPadding.
+     Implements Proposal 251 and Section 2 of Proposal 254; closes ticket
+     16861.
+   - Relays will publish 24 hour totals of padding and non-padding cell
+     counts to their extra-info descriptors, unless PaddingStatistics 0
+     is set in torrc. These 24 hour totals are also rounded to multiples
+     of 10000.
+
+  o Major bugfixes (hidden service directory, security):
+    - Fix an assertion failure in the hidden service directory code, which
+      could be used by an attacker to remotely cause a Tor relay process to
+      exit. Relays running earlier versions of Tor 0.3.0.x should upgrade.
+      This security issue is tracked as tracked as
+      TROVE-2017-002. Fixes bug 22246; bugfix on 0.3.0.1-alpha.
+
+  o Major bugfixes (linux TPROXY support):
+    - Fix a typo that had prevented TPROXY-based transparent proxying from
+      working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
+      Patch from "d4fq0fQAgoJ".
+
+  o Minor feature (defaults, directory):
+    - Onion key rotation and expiry intervals are now defined as a network
+      consensus parameter as per proposal 274. The default lifetime of an
+      onion key is bumped from 7 to 28 days. Old onion keys will expire after 7
+      days by default. Closes ticket 21641.
+
+  o Minor feature (hidden services):
+    - Add more information to the message logged when a hidden service
+      descriptor has fewer introduction points than specified in
+      HiddenServiceNumIntroductionPoints.
+      Follow up to tickets 21598 and 21599, closes ticket 21622.
+    - Log a message when a hidden service descriptor has fewer introduction
+      points than specified in HiddenServiceNumIntroductionPoints.
+      Closes ticket 21598.
+    - Log a message when a hidden service reaches its introduction point
+      circuit limit, and when that limit is reset.
+      Follow up to ticket 21594, closes ticket 21622.
+
+  o Minor feature (include on config files):
+    - Adds config-can-saveconf to GETINFO command to tell if SAVECONF
+      will work without the FORCE option, closes ticket 1922.
+    - Allow the use of %include on configuration files to include settings
+      from other files or directories. Using %include with a directory will
+      include all (non-dot) files in that directory in lexically sorted order
+      (non-recursive), closes ticket 1922.
+    - Makes SAVECONF command return error when overwriting a torrc
+      that has includes. Using SAVECONF with the FORCE option will
+      allow it to overwrite torrc even if includes are used, closes ticket
+      1922.
+
+  o Minor features (controller):
+    - Warn the first time that a controller requests data in the
+      long-deprecated 'GETINFO network-status' format. Closes ticket 21703.
+
+  o Minor features (defaults, security):
+    - The default value for UseCreateFast is now 0: clients which haven't yet
+      received a consensus document will nonetheless use a proper handshake
+      to talk to their directory servers (when they can). Closes ticket 21407.
+
+  o Minor features (fallback directories):
+    - Update the fallback directory mirror whitelist and blacklist based on
+      operator emails. Closes task 21121.
+
+  o Minor features (fallback directory list):
+    - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
+      December 2016 (of which ~126 were still functional), with a list of
+      151 fallbacks (32 new, 119 existing, 58 removed) generated in
+      May 2017.
+      Resolves ticket 21564.
+
+  o Minor features (hidden service, logging):
+    - Warn user if multiple entries in  EntryNodes and at least one
+      HiddenService are used together. Pinning EntryNodes along with an hidden
+      service can be possibly harmful for instance see ticket 14917 or 21155.
+      Closes ticket 21155.
+
+  o Minor features (infrastructure, seccomp2 sandbox):
+    - We now have a document storage backend compatible with the Linux
+      seccomp2 sandbox. The long-term plan is to use this backend for
+      consensus documents and for storing unparseable directory
+      material.  Closes ticket 21645.
+
+  o Minor features (linux seccomp2 sandbox):
+    - Increase the maximum allowed size passed to mprotect(PROT_WRITE)
+      from 1MB to 16MB. This was necessary with the glibc allocator in
+      order to allow worker threads to allocate more memory -- which in
+      turn is necessary because of our new use of worker threads for
+      compression. Closes ticket 22096.
+
+  o Minor features (logging):
+    - Log files are no longer created world-readable by default.
+      (Previously, most distributors would store the logs in a
+      non-world-readable location to prevent inappropriate access. This
+      change is an extra precaution.)  Closes ticket 21729; patch from
+      toralf.
+
+  o Minor features (performance):
+    - The minimal keccak implementation we include now accesses memory
+      more efficiently, especially on little-endian systems.
+      Closes ticket 21737.
+
+  o Minor features (performance, controller):
+    - Add an O(1) implementation of channel_find_by_global_id().
+
+  o Minor features (relay, configuration):
+    - The MyFamily line may now be repeated as many times as desired, for
+      relays that want to configure large families. Closes ticket 4998;
+      patch by Daniel Pinto.
+
+  o Minor features (safety):
+    - Add an explict check to extrainfo_parse_entry_from_string() for NULL
+      inputs. We don't believe this can actually happen, but it may help
+      silence a warning from the Clang analyzer. Closes ticket 21496.
+
+  o Minor features (security, windows):
+    - Enable a couple of pieces of Windows hardening: one
+      (HeapEnableTerminationOnCorruption) that has been on-by-default since
+      Windows 8, and unavailable before Windows 7, and one
+      (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
+      affect us, but shouldn't do any harm. Closes ticket 21953.
+
+  o Minor features (testing):
+    - Add a "--disable-memory-sentinels" feature to help with fuzzing.
+      When Tor is compiled with this option, we disable a number of
+      redundant memory-safety failsafes that are intended to stop
+      bugs from becoming security issues. This makes it easier to hunt
+      for bugs that would be security issues without the failsafes
+      turned on. Closes ticket 21439.
+    - Add a general event-tracing instrumentation support to Tor.  This
+      subsystem will enable developers and researchers to add fine-grained
+      instrumentation to their Tor instances, for use when examining Tor
+      network performance issues.  There are no trace events yet, and
+      event-tracing is off by default unless enabled at compile time.
+      Implements ticket 13802.
+
+  o Minor features (unit tests):
+    - Improve version parsing tests: add tests for typical version components,
+      add tests for invalid versions, including numeric range and non-numeric
+      prefixes.
+      Unit tests 21278, 21450, and 21507. Partially implements 21470.
+
+  o Minor bugfix (directory authority):
+    - Prevent the shared randomness subsystem from asserting when initialized
+      by a bridge authority with an incomplete configuration file. Fixes bug
+      21586; bugfix on 0.2.9.8.
+
+  o Minor bugfixes (bandwidth accounting):
+    - Roll over monthly accounting at the configured hour and minute,
+      rather than always at 00:00.
+      Fixes bug 22245; bugfix on 0.0.9rc1.
+      Found by Andrey Karpov with PVS-Studio.
+
+  o Minor bugfixes (cell, logging):
+    - Downgrade a log statement from bug to protocol warning because there is
+      at least one use case where it can be triggered by a buggy tor
+      implementation on the Internet for instance. Fixes bug 21293; bugfix on
+      0.1.1.14-alpha.
+
+  o Minor bugfixes (code correctness):
+    - Accurately identify client connections using their lack of peer
+      authentication. This means that we bail out earlier if asked to extend
+      to a client. Follow-up to 21407.
+      Fixes bug 21406; bugfix on 0.2.4.23.
+
+  o Minor bugfixes (configuration):
+    - Do not crash when starting with LearnCircuitBuildTimeout 0.
+      Fixes bug 22252; bugfix on 0.2.9.3-alpha.
+
+  o Minor bugfixes (connection lifespan):
+   - Allow more control over how long TLS connections are kept open: unify
+     CircuitIdleTimeout and PredictedPortsRelevanceTime into a single option
+     called CircuitsAvailableTimeout. Also, allow the consensus to control
+     the default values for both this preference, as well as the lifespan
+     of relay-to-relay connections. Fixes bug 17592; bugfix on 0.2.5.5-alpha.
+   - Increase the intial circuit build timeout testing frequency, to help
+     ensure that ReducedConnectionPadding clients finish learning a timeout
+     before their orconn would expire. The initial testing rate was set back
+     in the days of TAP and before the Tor Browser updater, when we had to be
+     much more careful about new clients making lots of circuits. With this
+     change, a circuit build time is learned in about 15-20 minutes, instead
+     of ~100-120 minutes.
+
+  o Minor bugfixes (connection usage):
+   - Relays will now log hourly statistics on the total number of
+     connections to other relays. If the number of connections per relay
+     unexpectedly large, this log message is at notice level. Otherwise
+     it is at info.
+   - Use NETINFO cells to try to determine if both relays involved in
+     a connection will agree on the canonical status of that connection.
+     Prefer the connections where this is the case for extend cells,
+     and try to close connections where relays disagree on canonical
+     status early. Also, additionally alter the connection selection
+     logic to prefer the oldest valid connection for extend cells.
+     These two changes should reduce the number of long-term connections
+     that are kept open between relays. Fixes bug 17604; bugfix on
+     0.2.5.5-alpha.
+
+  o Minor bugfixes (control, hidden service client):
+    - Trigger HS descriptor events on the control port when the client is
+      unable to pick a suitable hidden service directory. This can happen if
+      they are all in the ExcludeNodes list or they all have been queried
+      inside the allowed 15 minutes. Fixes bug 22042; bugfix on
+      0.2.5.2-alpha.
+
+  o Minor bugfixes (controller):
+    - GETINFO onions/current and onions/detached no longer 551 on empty lists
+      Fixes bug 21329; bugfix on 0.2.7.1-alpha.
+
+  o Minor bugfixes (directory authority):
+    - When rejecting a router descriptor because the relay is running an
+      obsolete version of Tor without ntor support, warn about the obsolete
+      tor version, not the missing ntor key. Fixes bug 20270;
+      bugfix on 0.2.9.3-alpha.
+
+  o Minor bugfixes (documentation):
+    - Default of NumEntryGuards is 1 if the consensus parameter
+      guard-n-primary-guards-to-use isn't set. Default of NumDirectoryGuards
+      is 3 if the consensus parameter guard-n-primary-dir-guards-to-use isn't
+      set. Fixes bug 21715; bugfix on 0.3.0.1-alpha.
+
+  o Minor bugfixes (exit-side DNS):
+    - Fix an untriggerable assertion that checked the output of a
+      libevent DNS error, so that the assertion actually behaves as
+      expected.  Fixes bug 22244; bugfix on 0.2.0.20-rc. Found by Andrey
+      Karpov using PVS-Studio.
+
+  o Minor bugfixes (fallback directory mirrors):
+    - Make the usage example in updateFallbackDirs.py actually work.
+      (And explain what it does.)
+      Fixes bug 22270; bugfix on 0.3.0.3-alpha.
+
+  o Minor bugfixes (fallbacks):
+    - Decrease the guard flag average required to be a fallback. This allows
+      us to keep relays that have their guard flag removed when they restart.
+      Fixes bug 20913; bugfix on 0.2.8.1-alpha.
+    - Decrease the minimum number of fallbacks to 100.
+      Fixes bug 20913; bugfix on 0.2.8.1-alpha.
+    - Make sure fallback directory mirrors have the same address, port, and
+      relay identity key for at least 30 days before they are selected.
+      Fixes bug 20913; bugfix on 0.2.8.1-alpha.
+
+  o Minor bugfixes (hidden service):
+    - Stop printing cryptic warning when a client tries to connect on an
+      invalid port of the service. Fixes bug 16706; bugfix on 0.2.6.3-alpha.
+
+  o Minor bugfixes (hidden services):
+    - Simplify hidden service descriptor creation by using an existing flag
+      to check if an introduction point is established.
+      Fixes bug 21599; bugfix on 0.2.7.2-alpha.
+
+  o Minor bugfixes (memory leak):
+    - Fix a small memory leak at exit from the backtrace handler code.
+      Fixes bug 21788; bugfix on 0.2.5.2-alpha. Patch from Daniel Pinto.
+
+  o Minor bugfixes (testing):
+    - Make test-network.sh always call chutney's test-network.sh.
+      Previously, this only worked on systems which had bash installed, due to
+      some bash-specific code in the script.
+      Fixes bug 19699; bugfix on 0.3.0.4-rc. Follow-up to ticket 21581.
+    - Use unbuffered I/O for utility functions around the process_handle_t
+      type. This fixes unit test failures reported on OpenBSD and FreeBSD.
+      Fixes bug 21654; bugfix on 0.2.3.1-alpha.
+
+  o Minor bugfixes (unit tests):
+    - Make display of captured unit test log messages consistent.
+      Fixes bug 21510; bugfix on 0.2.9.3-alpha.
+
+  o Minor bugfixes (voting consistency):
+    - Reject version numbers with non-numeric prefixes (such as +, -, and
+      whitespace). Disallowing whitespace prevents differential version
+      parsing between POSIX-based and Windows platforms.
+      Fixes bug 21507 and part of 21508; bugfix on 0.0.8pre1.
+
+  o Minor bugfixes (windows, relay):
+    - Resolve "Failure from drain_fd: No error" warnings on Windows
+      relays. Fixes bug 21540; bugfix on 0.2.6.3-alpha.
+
+  o Code simplification and refactoring:
+    - Break up the 630-line function connection_dir_client_reached_eof() into
+      a dozen smaller functions. This change should help maintainability and
+      readability of the client directory code.
+    - Isolate our usage of the openssl headers so that they are only
+      used from our crypto wrapper modules, and from tests that examing those
+      modules' internals. Closes ticket 21841.
+    - Our API to launch directory requests has been greatly simplified
+      to become more extensible and less error-prone. We'll be using
+      this to improve support for adding extra headers to directory
+      requests. Closes ticket 21646.
+    - Our base64 decoding functions no longer overestimate the output
+      space that they will need when parsing unpadded inputs.
+      Closes ticket 17868.
+    - Remove unused "ROUTER_ADDED_NOTIFY_GENERATOR" internal value.
+      Resolves ticket 22213.
+    - The logic that directory caches use to spool request to clients,
+      serving them one part at a time so as not to allocate too much memory,
+      has been refactored for consistency.  Previously there was a separate
+      spooling implementation per type of spoolable data.  Now there
+      is one common spooling implementation, with extensible data types.
+      Closes ticket 21651.
+    - Tor's compression module now supports multiple backends. Part of
+      an implementation of proposal 278; closes ticket 21663.
+
+  o Documentation:
+    - Clarify the behavior of the KeepAliveIsolateSOCKSAuth sub-option.
+      Closes ticket 21873.
+    - Correct the documentation about the default DataDirectory value.
+      Closes ticket 21151.
+    - Document key=value pluggable transport arguments for Bridge lines in
+      torrc.  Fixes bug 20341; bugfix on 0.2.5.1-alpha.
+    - Note that bandwidth-limiting options don't affect TCP headers or DNS.
+      Closes ticket 17170.
+
+  o Removed features (configuration options, all in ticket 22060):
+    - AllowInvalidNodes was deprecated in 0.2.9.2-alpha and now has been
+      removed. It is not possible anymore to use Invalid nodes.
+    - AllowSingleHopCircuits was deprecated in 0.2.9.2-alpha and now has been
+      removed. It's not possible anymore to attach streams to single hop exit
+      circuit.
+    - AllowSingleHopExits was deprecated in 0.2.9.2-alpha and now has been
+      removed. Relays no longer advertise that they can be used for single hop
+      exit proxy.
+    - CloseHSClientCircuitsImmediatelyOnTimeout was deprecated in
+      0.2.9.2-alpha and now has been removed. HS circuits never close on
+      circuit build timeout, they have a longer timeout period.
+    - CloseHSServiceRendCircuitsImmediatelyOnTimeout was deprecated in
+      0.2.9.2-alpha and now has been removed. HS circuits never close on
+      circuit build timeout, they have a long timeout period.
+    - ExcludeSingleHopRelays was deprecated in 0.2.9.2-alpha and now has been
+      removed. Client will always exclude relays that supports single hop
+      exits meaning relays that still advertise AllowSingleHopExits.
+    - FastFirstHopPK was deprecated in 0.2.9.2-alpha and now has been removed.
+      Decision for this feature will always be decided by the consensus.
+    - TLSECGroup was deprecated in 0.2.9.2-alpha and now has been removed.
+      P256 EC group is always used.
+    - WarnUnsafeSocks was deprecated in 0.2.9.2-alpha and now has been
+      removed. Tor will now always warn the user if only an IP address is
+      given instead of an hostname on a SOCKS connection if SafeSocks is 1.
+    - {Control,DNS,Dir,Socks,Trans,NATD,OR}ListenAddress was deprecated in
+      0.2.9.2-alpha and now has been removed. Use the ORPort (and others).
+
+  o Removed features:
+    - We've removed the tor-checkkey tool from src/tools. Long ago, we
+      used it to help people detect RSA keys that were generated by
+      versions of Debian affected by CVE-2008-0166. But those keys
+      have been out of circulation for ages, and this tool is no
+      longer required.  Closes ticket 21842.
+
 
 
 Changes in version 0.3.0.7 - 2017-05-15
diff --git a/changes/17868 b/changes/17868
deleted file mode 100644
index 77a8ba1..0000000
--- a/changes/17868
+++ /dev/null
@@ -1,4 +0,0 @@
-  o Code simplification and refactoring:
-    - Our base64 decoding functions no longer overestimate the output
-      space that they will need when parsing unpadded inputs.
-      Closes ticket 17868.
diff --git a/changes/21662_21663_21664 b/changes/21662_21663_21664
deleted file mode 100644
index da47c6d..0000000
--- a/changes/21662_21663_21664
+++ /dev/null
@@ -1,12 +0,0 @@
-  o Major features (directory system):
-    - Tor's compression module now includes support for the zstd and lzma2
-      compression algorithms, if the libzstd and liblzma libraries are
-      available when Tor is compiled.  Once these features are exposed in the
-      directory module, they will enable Tor to provide better compression
-      ratios on directory documents. Part of an implementation for proposal
-      278; closes ticket 21662.
-
-  o Code simplification and refactoring:
-    - Tor's compression module now supports multiple backends. Part of
-      an implementation of proposal 278; closes ticket 21663.
-
diff --git a/changes/21873 b/changes/21873
deleted file mode 100644
index 24dc824..0000000
--- a/changes/21873
+++ /dev/null
@@ -1,3 +0,0 @@
-  o Documentation:
-    - Clarify the behavior of the KeepAliveIsolateSOCKSAuth sub-option.
-      Closes ticket 21873.
diff --git a/changes/bug16706 b/changes/bug16706
deleted file mode 100644
index b0b3351..0000000
--- a/changes/bug16706
+++ /dev/null
@@ -1,3 +0,0 @@
-  o Minor bugfixes (hidden service):
-    - Stop printing cryptic warning when a client tries to connect on an
-      invalid port of the service. Fixes bug 16706; bugfix on 0.2.6.3-alpha.
diff --git a/changes/bug16861 b/changes/bug16861
deleted file mode 100644
index f540254..0000000
--- a/changes/bug16861
+++ /dev/null
@@ -1,16 +0,0 @@
-  o Major features (traffic analysis resistance):
-   - Relays and clients will now send a padding cell on idle OR
-     connections every 1.5 to 9.5 seconds (tunable via consensus
-     parameters). Directory connections and inter-relay connections
-     are not padded. Padding is negotiated using Tor's link protocol,
-     so both relays and clients must upgrade for this to take effect.
-     Clients may still send padding despite the relay's version by
-     setting ConnectionPadding 1 in torrc, and may disable padding
-     by setting ConnectionPadding 0 in torrc. Padding may be minimized
-     for mobile users with the torrc option ReducedConnectionPadding.
-     Implements Proposal 251 and Section 2 of Proposal 254; closes ticket
-     16861.
-   - Relays will publish 24 hour totals of padding and non-padding cell
-     counts to their extra-info descriptors, unless PaddingStatistics 0
-     is set in torrc. These 24 hour totals are also rounded to multiples
-     of 10000.
diff --git a/changes/bug17170 b/changes/bug17170
deleted file mode 100644
index 24a9b94..0000000
--- a/changes/bug17170
+++ /dev/null
@@ -1,3 +0,0 @@
-  o Documentation:
-    - Note that bandwidth-limiting options don't affect TCP headers or DNS.
-      Closes ticket 17170.
diff --git a/changes/bug17592 b/changes/bug17592
deleted file mode 100644
index 131791b..0000000
--- a/changes/bug17592
+++ /dev/null
@@ -1,13 +0,0 @@
-  o Minor bugfixes (connection lifespan):
-   - Allow more control over how long TLS connections are kept open: unify
-     CircuitIdleTimeout and PredictedPortsRelevanceTime into a single option
-     called CircuitsAvailableTimeout. Also, allow the consensus to control
-     the default values for both this preference, as well as the lifespan
-     of relay-to-relay connections. Fixes bug 17592; bugfix on 0.2.5.5-alpha.
-   - Increase the intial circuit build timeout testing frequency, to help
-     ensure that ReducedConnectionPadding clients finish learning a timeout
-     before their orconn would expire. The initial testing rate was set back
-     in the days of TAP and before the Tor Browser updater, when we had to be
-     much more careful about new clients making lots of circuits. With this
-     change, a circuit build time is learned in about 15-20 minutes, instead
-     of ~100-120 minutes.
diff --git a/changes/bug17604 b/changes/bug17604
deleted file mode 100644
index 6cd9e2e..0000000
--- a/changes/bug17604
+++ /dev/null
@@ -1,15 +0,0 @@
-  o Minor bugfixes (connection usage):
-   - Use NETINFO cells to try to determine if both relays involved in
-     a connection will agree on the canonical status of that connection.
-     Prefer the connections where this is the case for extend cells,
-     and try to close connections where relays disagree on canonical
-     status early. Also, additionally alter the connection selection
-     logic to prefer the oldest valid connection for extend cells.
-     These two changes should reduce the number of long-term connections
-     that are kept open between relays. Fixes bug 17604; bugfix on
-     0.2.5.5-alpha.
-   - Relays will now log hourly statistics on the total number of
-     connections to other relays. If the number of connections per relay
-     unexpectedly large, this log message is at notice level. Otherwise
-     it is at info.
-
diff --git a/changes/bug18100 b/changes/bug18100
deleted file mode 100644
index cd3ba2c..0000000
--- a/changes/bug18100
+++ /dev/null
@@ -1,5 +0,0 @@
-  o Major bugfixes (linux TPROXY support):
-    - Fix a typo that had prevented TPROXY-based transparent proxying from
-      working under Linux. Fixes bug 18100; bugfix on 0.2.6.3-alpha.
-      Patch from "d4fq0fQAgoJ".
-
diff --git a/changes/bug19699 b/changes/bug19699
deleted file mode 100644
index 10ba57f..0000000
--- a/changes/bug19699
+++ /dev/null
@@ -1,5 +0,0 @@
-  o Minor bugfixes (testing):
-    - Make test-network.sh always call chutney's test-network.sh.
-      Previously, this only worked on systems which had bash installed, due to
-      some bash-specific code in the script.
-      Fixes bug 19699; bugfix on 0.3.0.4-rc. Follow-up to ticket 21581.
diff --git a/changes/bug20270 b/changes/bug20270
deleted file mode 100644
index d538a35..0000000
--- a/changes/bug20270
+++ /dev/null
@@ -1,6 +0,0 @@
-  o Minor bugfixes (directory authority):
-    - When rejecting a router descriptor because the relay is running an
-      obsolete version of Tor without ntor support, warn about the obsolete
-      tor version, not the missing ntor key. Fixes bug 20270;
-      bugfix on 0.2.9.3-alpha.
-
diff --git a/changes/bug20341 b/changes/bug20341
deleted file mode 100644
index 419240c..0000000
--- a/changes/bug20341
+++ /dev/null
@@ -1,3 +0,0 @@
-  o Documentation:
-    - Document key=value pluggable transport arguments for Bridge lines in
-      torrc.  Fixes bug 20341; bugfix on 0.2.5.1-alpha.
diff --git a/changes/bug20913 b/changes/bug20913
deleted file mode 100644
index df7f106..0000000
--- a/changes/bug20913
+++ /dev/null
@@ -1,9 +0,0 @@
-  o Minor bugfixes (fallbacks):
-    - Make sure fallback directory mirrors have the same address, port, and
-      relay identity key for at least 30 days before they are selected.
-      Fixes bug 20913; bugfix on 0.2.8.1-alpha.
-    - Decrease the guard flag average required to be a fallback. This allows
-      us to keep relays that have their guard flag removed when they restart.
-      Fixes bug 20913; bugfix on 0.2.8.1-alpha.
-    - Decrease the minimum number of fallbacks to 100.
-      Fixes bug 20913; bugfix on 0.2.8.1-alpha.
diff --git a/changes/bug21121 b/changes/bug21121
deleted file mode 100644
index 96b9730..0000000
--- a/changes/bug21121
+++ /dev/null
@@ -1,3 +0,0 @@
-  o Minor features (fallback directories):
-    - Update the fallback directory mirror whitelist and blacklist based on
-      operator emails. Closes task 21121.
diff --git a/changes/bug21155 b/changes/bug21155
deleted file mode 100644
index 67e4a64..0000000
--- a/changes/bug21155
+++ /dev/null
@@ -1,5 +0,0 @@
-  o Minor features (hidden service, logging):
-    - Warn user if multiple entries in  EntryNodes and at least one
-      HiddenService are used together. Pinning EntryNodes along with an hidden
-      service can be possibly harmful for instance see ticket 14917 or 21155.
-      Closes ticket 21155.
diff --git a/changes/bug21293 b/changes/bug21293
deleted file mode 100644
index 37e0c8c..0000000
--- a/changes/bug21293
+++ /dev/null
@@ -1,5 +0,0 @@
-  o Minor bugfixes (cell, logging):
-    - Downgrade a log statement from bug to protocol warning because there is
-      at least one use case where it can be triggered by a buggy tor
-      implementation on the Internet for instance. Fixes bug 21293; bugfix on
-      0.1.1.14-alpha.
diff --git a/changes/bug21329 b/changes/bug21329
deleted file mode 100644
index c31586e..0000000
--- a/changes/bug21329
+++ /dev/null
@@ -1,3 +0,0 @@
-  o Minor bugfixes (controller):
-    - GETINFO onions/current and onions/detached no longer 551 on empty lists
-      Fixes bug 21329; bugfix on 0.2.7.1-alpha.
diff --git a/changes/bug21406 b/changes/bug21406
deleted file mode 100644
index 170e631..0000000
--- a/changes/bug21406
+++ /dev/null
@@ -1,5 +0,0 @@
-  o Minor bugfixes (code correctness):
-    - Accurately identify client connections using their lack of peer
-      authentication. This means that we bail out earlier if asked to extend
-      to a client. Follow-up to 21407.
-      Fixes bug 21406; bugfix on 0.2.4.23.
diff --git a/changes/bug21407 b/changes/bug21407
deleted file mode 100644
index 8d0d917..0000000
--- a/changes/bug21407
+++ /dev/null
@@ -1,4 +0,0 @@
-  o Minor features (defaults, security):
-    - The default value for UseCreateFast is now 0: clients which haven't yet
-      received a consensus document will nonetheless use a proper handshake
-      to talk to their directory servers (when they can). Closes ticket 21407.
diff --git a/changes/bug21439 b/changes/bug21439
deleted file mode 100644
index 3acc53b..0000000
--- a/changes/bug21439
+++ /dev/null
@@ -1,7 +0,0 @@
-  o Minor features (testing):
-    - Add a "--disable-memory-sentinels" feature to help with fuzzing.
-      When Tor is compiled with this option, we disable a number of
-      redundant memory-safety failsafes that are intended to stop
-      bugs from becoming security issues. This makes it easier to hunt
-      for bugs that would be security issues without the failsafes
-      turned on. Closes ticket 21439.
diff --git a/changes/bug21496 b/changes/bug21496
deleted file mode 100644
index 24ac85a..0000000
--- a/changes/bug21496
+++ /dev/null
@@ -1,4 +0,0 @@
-  o Minor features (safety):
-    - Add an explict check to extrainfo_parse_entry_from_string() for NULL
-      inputs. We don't believe this can actually happen, but it may help
-      silence a warning from the Clang analyzer. Closes ticket 21496.
diff --git a/changes/bug21507 b/changes/bug21507
deleted file mode 100644
index f83e291..0000000
--- a/changes/bug21507
+++ /dev/null
@@ -1,5 +0,0 @@
-  o Minor bugfixes (voting consistency):
-    - Reject version numbers with non-numeric prefixes (such as +, -, and
-      whitespace). Disallowing whitespace prevents differential version
-      parsing between POSIX-based and Windows platforms.
-      Fixes bug 21507 and part of 21508; bugfix on 0.0.8pre1.
diff --git a/changes/bug21510 b/changes/bug21510
deleted file mode 100644
index 31c3e1a..0000000
--- a/changes/bug21510
+++ /dev/null
@@ -1,4 +0,0 @@
-  o Minor bugfixes (unit tests):
-    - Make display of captured unit test log messages consistent.
-      Fixes bug 21510; bugfix on 0.2.9.3-alpha.
-
diff --git a/changes/bug21540 b/changes/bug21540
deleted file mode 100644
index 0cf684b..0000000
--- a/changes/bug21540
+++ /dev/null
@@ -1,4 +0,0 @@
-  o Minor bugfixes (windows, relay):
-    - Resolve "Failure from drain_fd: No error" warnings on Windows
-      relays. Fixes bug 21540; bugfix on 0.2.6.3-alpha.
-
diff --git a/changes/bug21586 b/changes/bug21586
deleted file mode 100644
index 29701d9..0000000
--- a/changes/bug21586
+++ /dev/null
@@ -1,4 +0,0 @@
-  o Minor bugfix (directory authority):
-    - Prevent the shared randomness subsystem from asserting when initialized
-      by a bridge authority with an incomplete configuration file. Fixes bug
-      21586; bugfix on 0.2.9.8.
diff --git a/changes/bug21599 b/changes/bug21599
deleted file mode 100644
index fe0f21a..0000000
--- a/changes/bug21599
+++ /dev/null
@@ -1,4 +0,0 @@
-  o Minor bugfixes (hidden services):
-    - Simplify hidden service descriptor creation by using an existing flag
-      to check if an introduction point is established.
-      Fixes bug 21599; bugfix on 0.2.7.2-alpha.
diff --git a/changes/bug21641 b/changes/bug21641
deleted file mode 100644
index b04e52c..0000000
--- a/changes/bug21641
+++ /dev/null
@@ -1,5 +0,0 @@
-  o Minor feature (defaults, directory):
-    - Onion key rotation and expiry intervals are now defined as a network
-      consensus parameter as per proposal 274. The default lifetime of an
-      onion key is bumped from 7 to 28 days. Old onion keys will expire after 7
-      days by default. Closes ticket 21641.
diff --git a/changes/bug21654 b/changes/bug21654
deleted file mode 100644
index c3badd2..0000000
--- a/changes/bug21654
+++ /dev/null
@@ -1,4 +0,0 @@
-  o Minor bugfixes (testing):
-    - Use unbuffered I/O for utility functions around the process_handle_t
-      type. This fixes unit test failures reported on OpenBSD and FreeBSD.
-      Fixes bug 21654; bugfix on 0.2.3.1-alpha.
diff --git a/changes/bug21703 b/changes/bug21703
deleted file mode 100644
index 3034fc5..0000000
--- a/changes/bug21703
+++ /dev/null
@@ -1,4 +0,0 @@
-  o Minor features (controller):
-    - Warn the first time that a controller requests data in the
-      long-deprecated 'GETINFO network-status' format. Closes ticket 21703.
-
diff --git a/changes/bug21715 b/changes/bug21715
deleted file mode 100644
index 54ad1ad..0000000
--- a/changes/bug21715
+++ /dev/null
@@ -1,5 +0,0 @@
-  o Minor bugfixes (documentation):
-    - Default of NumEntryGuards is 1 if the consensus parameter
-      guard-n-primary-guards-to-use isn't set. Default of NumDirectoryGuards
-      is 3 if the consensus parameter guard-n-primary-dir-guards-to-use isn't
-      set. Fixes bug 21715; bugfix on 0.3.0.1-alpha.
diff --git a/changes/bug21788 b/changes/bug21788
deleted file mode 100644
index ad8365f..0000000
--- a/changes/bug21788
+++ /dev/null
@@ -1,3 +0,0 @@
-  o Minor bugfixes (memory leak):
-    - Fix a small memory leak at exit from the backtrace handler code.
-      Fixes bug 21788; bugfix on 0.2.5.2-alpha. Patch from Daniel Pinto.
diff --git a/changes/bug22042 b/changes/bug22042
deleted file mode 100644
index dccf83d..0000000
--- a/changes/bug22042
+++ /dev/null
@@ -1,7 +0,0 @@
-  o Minor bugfixes (control, hidden service client):
-    - Trigger HS descriptor events on the control port when the client is
-      unable to pick a suitable hidden service directory. This can happen if
-      they are all in the ExcludeNodes list or they all have been queried
-      inside the allowed 15 minutes. Fixes bug 22042; bugfix on
-      0.2.5.2-alpha.
-
diff --git a/changes/bug22060 b/changes/bug22060
deleted file mode 100644
index db373dd..0000000
--- a/changes/bug22060
+++ /dev/null
@@ -1,28 +0,0 @@
-  o Removed features (configuration options, all in ticket 22060):
-    - AllowInvalidNodes was deprecated in 0.2.9.2-alpha and now has been
-      removed. It is not possible anymore to use Invalid nodes.
-    - AllowSingleHopCircuits was deprecated in 0.2.9.2-alpha and now has been
-      removed. It's not possible anymore to attach streams to single hop exit
-      circuit.
-    - AllowSingleHopExits was deprecated in 0.2.9.2-alpha and now has been
-      removed. Relays no longer advertise that they can be used for single hop
-      exit proxy.
-    - ExcludeSingleHopRelays was deprecated in 0.2.9.2-alpha and now has been
-      removed. Client will always exclude relays that supports single hop
-      exits meaning relays that still advertise AllowSingleHopExits.
-    - FastFirstHopPK was deprecated in 0.2.9.2-alpha and now has been removed.
-      Decision for this feature will always be decided by the consensus.
-    - CloseHSClientCircuitsImmediatelyOnTimeout was deprecated in
-      0.2.9.2-alpha and now has been removed. HS circuits never close on
-      circuit build timeout, they have a longer timeout period.
-    - CloseHSServiceRendCircuitsImmediatelyOnTimeout was deprecated in
-      0.2.9.2-alpha and now has been removed. HS circuits never close on
-      circuit build timeout, they have a long timeout period.
-    - WarnUnsafeSocks was deprecated in 0.2.9.2-alpha and now has been
-      removed. Tor will now always warn the user if only an IP address is
-      given instead of an hostname on a SOCKS connection if SafeSocks is 1.
-    - TLSECGroup was deprecated in 0.2.9.2-alpha and now has been removed.
-      P256 EC group is always used.
-    - {Control,DNS,Dir,Socks,Trans,NATD,OR}ListenAddress was deprecated in
-      0.2.9.2-alpha and now has been removed. Use the ORPort (and others).
-
diff --git a/changes/bug22096 b/changes/bug22096
deleted file mode 100644
index 83dac9c..0000000
--- a/changes/bug22096
+++ /dev/null
@@ -1,6 +0,0 @@
-  o Minor features (linux seccomp2 sandbox):
-    - Increase the maximum allowed size passed to mprotect(PROT_WRITE)
-      from 1MB to 16MB. This was necessary with the glibc allocator in
-      order to allow worker threads to allocate more memory -- which in
-      turn is necessary because of our new use of worker threads for
-      compression. Closes ticket 22096.
diff --git a/changes/bug22244 b/changes/bug22244
deleted file mode 100644
index ed5d36b..0000000
--- a/changes/bug22244
+++ /dev/null
@@ -1,6 +0,0 @@
-  o Minor bugfixes (exit-side DNS):
-    - Fix an untriggerable assertion that checked the output of a
-      libevent DNS error, so that the assertion actually behaves as
-      expected.  Fixes bug 22244; bugfix on 0.2.0.20-rc. Found by Andrey
-      Karpov using PVS-Studio.
-
diff --git a/changes/bug22245 b/changes/bug22245
deleted file mode 100644
index 6ae1859..0000000
--- a/changes/bug22245
+++ /dev/null
@@ -1,5 +0,0 @@
-  o Minor bugfixes (bandwidth accounting):
-    - Roll over monthly accounting at the configured hour and minute,
-      rather than always at 00:00.
-      Fixes bug 22245; bugfix on 0.0.9rc1.
-      Found by Andrey Karpov with PVS-Studio.
diff --git a/changes/bug22246 b/changes/bug22246
deleted file mode 100644
index dbdf31a..0000000
--- a/changes/bug22246
+++ /dev/null
@@ -1,6 +0,0 @@
-  o Major bugfixes (hidden service directory, security):
-    - Fix an assertion failure in the hidden service directory code, which
-      could be used by an attacker to remotely cause a Tor relay process to
-      exit. Relays running earlier versions of Tor 0.3.0.x should upgrade.
-      This security issue is tracked as tracked as
-      TROVE-2017-002. Fixes bug 22246; bugfix on 0.3.0.1-alpha.
diff --git a/changes/bug22252 b/changes/bug22252
deleted file mode 100644
index 42b9d8e..0000000
--- a/changes/bug22252
+++ /dev/null
@@ -1,3 +0,0 @@
-  o Minor bugfixes (configuration):
-    - Do not crash when starting with LearnCircuitBuildTimeout 0.
-      Fixes bug 22252; bugfix on 0.2.9.3-alpha.
diff --git a/changes/bug22270 b/changes/bug22270
deleted file mode 100644
index 6b58446..0000000
--- a/changes/bug22270
+++ /dev/null
@@ -1,4 +0,0 @@
-  o Minor bugfixes (fallback directory mirrors):
-    - Make the usage example in updateFallbackDirs.py actually work.
-      (And explain what it does.)
-      Fixes bug 22270; bugfix on 0.3.0.3-alpha.
diff --git a/changes/cleanup22213 b/changes/cleanup22213
deleted file mode 100644
index d100aee..0000000
--- a/changes/cleanup22213
+++ /dev/null
@@ -1,4 +0,0 @@
-  o Code simplification and refactoring:
-    - Remove unused "ROUTER_ADDED_NOTIFY_GENERATOR" internal value.
-      Resolves ticket 22213.
-
diff --git a/changes/consdiff_21643 b/changes/consdiff_21643
deleted file mode 100644
index 38d4656..0000000
--- a/changes/consdiff_21643
+++ /dev/null
@@ -1,5 +0,0 @@
-  o Major features (internals):
-    - Add an ed diff/patch backend, optimized for consensus documents.
-      This backend will be the basis of our consensus diff implementation.
-      Most of the work here was done 
-      by Daniel Martí. Closes ticket 21643.
diff --git a/changes/data_dir_default_doc b/changes/data_dir_default_doc
deleted file mode 100644
index 6b49bb2..0000000
--- a/changes/data_dir_default_doc
+++ /dev/null
@@ -1,3 +0,0 @@
-  o Documentation:
-    - Correct the documentation about the default DataDirectory value.
-      Closes ticket 21151.
diff --git a/changes/fast_channel_lookup b/changes/fast_channel_lookup
deleted file mode 100644
index de0f351..0000000
--- a/changes/fast_channel_lookup
+++ /dev/null
@@ -1,2 +0,0 @@
-  o Minor features (performance, controller):
-    - Add an O(1) implementation of channel_find_by_global_id().
diff --git a/changes/faster-keccak b/changes/faster-keccak
deleted file mode 100644
index 45fc152..0000000
--- a/changes/faster-keccak
+++ /dev/null
@@ -1,4 +0,0 @@
-  o Minor features (performance):
-    - The minimal keccak implementation we include now accesses memory
-      more efficiently, especially on little-endian systems.
-      Closes ticket 21737.
diff --git a/changes/feature1922 b/changes/feature1922
deleted file mode 100644
index e3c059d..0000000
--- a/changes/feature1922
+++ /dev/null
@@ -1,11 +0,0 @@
-  o Minor feature (include on config files):
-    - Allow the use of %include on configuration files to include settings
-      from other files or directories. Using %include with a directory will
-      include all (non-dot) files in that directory in lexically sorted order
-      (non-recursive), closes ticket 1922.
-    - Makes SAVECONF command return error when overwriting a torrc
-      that has includes. Using SAVECONF with the FORCE option will
-      allow it to overwrite torrc even if includes are used, closes ticket
-      1922.
-    - Adds config-can-saveconf to GETINFO command to tell if SAVECONF
-      will work without the FORCE option, closes ticket 1922.
diff --git a/changes/feature21598 b/changes/feature21598
deleted file mode 100644
index 317ace4..0000000
--- a/changes/feature21598
+++ /dev/null
@@ -1,4 +0,0 @@
-  o Minor feature (hidden services):
-    - Log a message when a hidden service descriptor has fewer introduction
-      points than specified in HiddenServiceNumIntroductionPoints.
-      Closes ticket 21598.
diff --git a/changes/feature21622 b/changes/feature21622
deleted file mode 100644
index 163b90b..0000000
--- a/changes/feature21622
+++ /dev/null
@@ -1,8 +0,0 @@
-  o Minor feature (hidden services):
-    - Log a message when a hidden service reaches its introduction point
-      circuit limit, and when that limit is reset.
-      Follow up to ticket 21594, closes ticket 21622.
-    - Add more information to the message logged when a hidden service
-      descriptor has fewer introduction points than specified in
-      HiddenServiceNumIntroductionPoints.
-      Follow up to tickets 21598 and 21599, closes ticket 21622.
diff --git a/changes/feature22106 b/changes/feature22106
deleted file mode 100644
index d277007..0000000
--- a/changes/feature22106
+++ /dev/null
@@ -1,12 +0,0 @@
-  o Major features (security, stability, experimental):
-
-    - Tor now has the optional ability to include modules written in
-      Rust.  To turn this on, pass the "--enable-rust" flag to the
-      configure script.
-
-      It's not time to get excited yet: currently, there is no actual
-      Rust functionality beyond some simple glue code, and a notice at
-      startup to tell you that Rust is running. Still, we hope that
-      programmers and packagers will try building with rust
-      support, so that we can find issues with the build system,
-      and solve portability issues. Closes ticket 22106.
diff --git a/changes/new_spooling_backend b/changes/new_spooling_backend
deleted file mode 100644
index a100688..0000000
--- a/changes/new_spooling_backend
+++ /dev/null
@@ -1,7 +0,0 @@
-  o Code simplification and refactoring:
-    - The logic that directory caches use to spool request to clients,
-      serving them one part at a time so as not to allocate too much memory,
-      has been refactored for consistency.  Previously there was a separate
-      spooling implementation per type of spoolable data.  Now there
-      is one common spooling implementation, with extensible data types.
-      Closes ticket 21651.
diff --git a/changes/prop140 b/changes/prop140
deleted file mode 100644
index 661028c..0000000
--- a/changes/prop140
+++ /dev/null
@@ -1,10 +0,0 @@
-  o Major features (directory protocol):
-    - Tor relays and authorities are now able to serve clients an
-      abbreviated version of the networkstatus consensus document,
-      containing only the changes since the an older consensus document that
-      the client holds. Clients now request these documents when
-      available. When this new protocol is in use by both client and server,
-      they will use far less bandwidth (up to 94% less) to keep an up-to-date
-      consensus. Implements proposal 140; closes ticket 13339. Based
-      on work by by Daniel Martí.
-
diff --git a/changes/refactor_reached_eof b/changes/refactor_reached_eof
deleted file mode 100644
index 33ab931..0000000
--- a/changes/refactor_reached_eof
+++ /dev/null
@@ -1,5 +0,0 @@
-  o Code simplification and refactoring:
-
-    - Break up the 630-line function connection_dir_client_reached_eof() into
-      a dozen smaller functions. This change should help maintainability and
-      readability of the client directory code.
diff --git a/changes/storagedir b/changes/storagedir
deleted file mode 100644
index afaaab3..0000000
--- a/changes/storagedir
+++ /dev/null
@@ -1,5 +0,0 @@
-  o Minor features (infrastructure, seccomp2 sandbox):
-    - We now have a document storage backend compatible with the Linux
-      seccomp2 sandbox. The long-term plan is to use this backend for
-      consensus documents and for storing unparseable directory
-      material.  Closes ticket 21645.
diff --git a/changes/test21470 b/changes/test21470
deleted file mode 100644
index f3ce484..0000000
--- a/changes/test21470
+++ /dev/null
@@ -1,5 +0,0 @@
-  o Minor features (unit tests):
-    - Improve version parsing tests: add tests for typical version components,
-      add tests for invalid versions, including numeric range and non-numeric
-      prefixes.
-      Unit tests 21278, 21450, and 21507. Partially implements 21470.
diff --git a/changes/ticket13802 b/changes/ticket13802
deleted file mode 100644
index 35cd2b5..0000000
--- a/changes/ticket13802
+++ /dev/null
@@ -1,7 +0,0 @@
-  o Minor features (testing):
-    - Add a general event-tracing instrumentation support to Tor.  This
-      subsystem will enable developers and researchers to add fine-grained
-      instrumentation to their Tor instances, for use when examining Tor
-      network performance issues.  There are no trace events yet, and
-      event-tracing is off by default unless enabled at compile time.
-      Implements ticket 13802.
diff --git a/changes/ticket21564 b/changes/ticket21564
deleted file mode 100644
index 7e01f41..0000000
--- a/changes/ticket21564
+++ /dev/null
@@ -1,6 +0,0 @@
-  o Minor features (fallback directory list):
-    - Replace the 177 fallbacks originally introduced in Tor 0.2.9.8 in
-      December 2016 (of which ~126 were still functional), with a list of
-      151 fallbacks (32 new, 119 existing, 58 removed) generated in
-      May 2017.
-      Resolves ticket 21564.
diff --git a/changes/ticket21646 b/changes/ticket21646
deleted file mode 100644
index a0e4fb6..0000000
--- a/changes/ticket21646
+++ /dev/null
@@ -1,6 +0,0 @@
-  o Code simplification and refactoring:
-    - Our API to launch directory requests has been greatly simplified
-      to become more extensible and less error-prone. We'll be using
-      this to improve support for adding extra headers to directory
-      requests. Closes ticket 21646.
-
diff --git a/changes/ticket21729 b/changes/ticket21729
deleted file mode 100644
index 51d1173..0000000
--- a/changes/ticket21729
+++ /dev/null
@@ -1,7 +0,0 @@
-  o Minor features (logging):
-    - Log files are no longer created world-readable by default.
-      (Previously, most distributors would store the logs in a
-      non-world-readable location to prevent inappropriate access. This
-      change is an extra precaution.)  Closes ticket 21729; patch from
-      toralf.
-
diff --git a/changes/ticket21841 b/changes/ticket21841
deleted file mode 100644
index 08c7406..0000000
--- a/changes/ticket21841
+++ /dev/null
@@ -1,4 +0,0 @@
-  o Code simplification and refactoring:
-    - Isolate our usage of the openssl headers so that they are only
-      used from our crypto wrapper modules, and from tests that examing those
-      modules' internals. Closes ticket 21841.
diff --git a/changes/ticket21842 b/changes/ticket21842
deleted file mode 100644
index 4b039c6..0000000
--- a/changes/ticket21842
+++ /dev/null
@@ -1,6 +0,0 @@
-  o Removed features:
-    - We've removed the tor-checkkey tool from src/tools. Long ago, we
-      used it to help people detect RSA keys that were generated by
-      versions of Debian affected by CVE-2008-0166. But those keys
-      have been out of circulation for ages, and this tool is no
-      longer required.  Closes ticket 21842.
diff --git a/changes/ticket21953 b/changes/ticket21953
deleted file mode 100644
index 46e1642..0000000
--- a/changes/ticket21953
+++ /dev/null
@@ -1,6 +0,0 @@
-  o Minor features (security, windows):
-    - Enable a couple of pieces of Windows hardening: one
-      (HeapEnableTerminationOnCorruption) that has been on-by-default since
-      Windows 8, and unavailable before Windows 7, and one
-      (PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION) which we believe doesn't
-      affect us, but shouldn't do any harm. Closes ticket 21953.
diff --git a/changes/ticket4998 b/changes/ticket4998
deleted file mode 100644
index b7b5d62..0000000
--- a/changes/ticket4998
+++ /dev/null
@@ -1,5 +0,0 @@
-  o Minor features (relay, configuration):
-    - The MyFamily line may now be repeated as many times as desired, for
-      relays that want to configure large families. Closes ticket 4998;
-      patch by Daniel Pinto.
-



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