Tor 0.2.2.24-alpha is out

Tor 0.2.2.24-alpha fixes a variety of bugs, including a big bug that
prevented Tor clients from effectively using "multihomed" bridges,
that is, bridges that listen on multiple ports or IP addresses so users
can continue to use some of their addresses even if others get blocked.

https://www.torproject.org/download/download

Major bugfixes:

• Fix a bug where bridge users who configure the non-canonical
  address of a bridge automatically switch to its canonical
  address. If a bridge listens at more than one address, it should be
  able to advertise those addresses independently and any non-blocked
  addresses should continue to work. Bugfix on Tor 0.2.0.x. Fixes
  bug 2510.
• If you configured Tor to use bridge A, and then quit and
  configured Tor to use bridge B instead, it would happily continue
  to use bridge A if it's still reachable. While this behavior is
  a feature if your goal is connectivity, in some scenarios it's a
  dangerous bug. Bugfix on Tor 0.2.0.1-alpha; fixes bug 2511.
• Directory authorities now use data collected from their own
  uptime observations when choosing whether to assign the HSDir flag
  to relays, instead of trusting the uptime value the relay reports in
  its descriptor. This change helps prevent an attack where a small
  set of nodes with frequently-changing identity keys can blackhole
  a hidden service. (Only authorities need upgrade; others will be
  fine once they do.) Bugfix on 0.2.0.10-alpha; fixes bug 2709.

Minor bugfixes:

• When we restart our relay, we might get a successful connection
  from the outside before we've started our reachability tests,
  triggering a warning: "ORPort found reachable, but I have no
  routerinfo yet. Failing to inform controller of success." This
  bug was harmless unless Tor is running under a controller
  like Vidalia, in which case the controller would never get a
  REACHABILITY_SUCCEEDED status event. Bugfix on 0.1.2.6-alpha;
  fixes bug 1172.
• Make directory authorities more accurate at recording when
  relays that have failed several reachability tests became
  unreachable, so we can provide more accuracy at assigning Stable,
  Guard, HSDir, etc flags. Bugfix on 0.2.0.6-alpha. Resolves bug 2716.
  - Fix an issue that prevented static linking of libevent on
  some platforms (notably Linux). Fixes bug 2698; bugfix on
  versions 0.2.1.23/0.2.2.8-alpha (the versions introducing
  the --with-static-libevent configure option).
• We now ask the other side of a stream (the client or the exit)
  for more data on that stream when the amount of queued data on
  that stream dips low enough. Previously, we wouldn't ask the
  other side for more data until either it sent us more data (which
  it wasn't supposed to do if it had exhausted its window!) or we
  had completely flushed all our queued data. This flow control fix
  should improve throughput. Fixes bug 2756; bugfix on the earliest
  released versions of Tor (svn commit r152).
• Avoid a double-mark-for-free warning when failing to attach a
  transparent proxy connection. (We thought we had fixed this in
  0.2.2.23-alpha, but it turns out our fix was checking the wrong
  connection.) Fixes bug 2757; bugfix on 0.1.2.1-alpha (the original
  bug) and 0.2.2.23-alpha (the incorrect fix).
• When warning about missing zlib development packages during compile,
  give the correct package names. Bugfix on 0.2.0.1-alpha.

Minor features:

• Directory authorities now log the source of a rejected POSTed v3
  networkstatus vote.
• Make compilation with clang possible when using
  --enable-gcc-warnings by removing two warning optionss that clang
  hasn't implemented yet and by fixing a few warnings. Implements
  ticket 2696.
• When expiring circuits, use microsecond timers rather than
  one-second timers. This can avoid an unpleasant situation where a
  circuit is launched near the end of one second and expired right
  near the beginning of the next, and prevent fluctuations in circuit
  timeout values.
• Use computed circuit-build timeouts to decide when to launch
  parallel introduction circuits for hidden services. (Previously,
  we would retry after 15 seconds.)

Packaging fixes:

• Create the /var/run/tor directory on startup on OpenSUSE if it is
  not already created. Patch from Andreas Stieger. Fixes bug 2573.

Documentation changes:

• Modernize the doxygen configuration file slightly. Fixes bug 2707.
• Resolve all doxygen warnings except those for missing documentation.
  Fixes bug 2705.
• Add doxygen documentation for more functions, fields, and types.