Log Message:
Updated tor 0.2.0.19-alpha to 0.2.0.21-rc.
Changes in version 0.2.0.21-rc - 2008-03-02
  Bugfixes only.
Changes in version 0.2.0.20-rc - 2008-02-24
  Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
  makes more progress towards normalizing Tor's TLS handshake, makes
  hidden services work better again, helps relays bootstrap if they don't
  know their IP address, adds optional support for linking in openbsd's
  allocator or tcmalloc, allows really fast relays to scale past 15000
  sockets, and fixes a bunch of minor bugs reported by Veracode.