Tor 0.0.2pre21 prerelease is out

[Roger Dingledine <arma@mit.edu>]

This release slightly improves reliability for clients (but there's
still plenty more to be done). pre21 should be compatible with pre18,
pre19, and pre20.

http://freehaven.net/tor/dist/tor-0.0.2pre21.tar.gz

Note that 'make install' will clobber your torrc, so back it up if you've
changed it.

For server operators: also note that I've moved the default exit policy
into the code itself, so unless you're defining your own exit policy
(e.g. you're a middleman node), you should just delete your ExitPolicy
line. See the new torrc for details.

Improvements since 0.0.2pre20:

New features:
  - There's a ChangeLog file that actually reflects the changelog.
  - There's a 'torify' wrapper script, with an accompanying
    tor-tsocks.conf, that simplifies the process of using tsocks for
    tor. It even has a man page.
  - The tor binary gets installed to sbin rather than bin now.
  - Retry streams where the connected cell hasn't arrived in 15 seconds
  - Clean up exit policy handling -- get the default out of the torrc,
    so we can update it without forcing each server operator to fix
    his/her torrc.
  - Allow imaps and pop3s in default exit policy

Bugfixes:
  - Prevent picking middleman nodes as the last node in the circuit