Pidgin 2.5.6

* libpurple
o Improve sleep behavior by aggregation of longer timeouts on second boundaries to allow better power saving. (Arunan Balasubramaniam)
o Fix various crashes on exit.
o Make XML parsing more resilient to interactions with other libraries. This, along with the fix for libxml2 bug 564217, fixes the crashes on connect in XMPP with recent gst-plugins-bad (see #8830 for details).
o Many security related fixes

* IRC
o Correctly handle WHOIS for users who are joined to a large number of channels.
o Notify the user if a /nick command fails, rather than trying fallback nicks.

* MSN
o Fix a race condition causing occasional Pidgin crashes.
o Fix some errors about the friendly name changing too fast caused by MSN/Yahoo integration buddies.

* XMPP
o Less likely to pop up a new conversation window in disregard of the "Hide new IM conversations" preference.

* Yahoo
o Fix a crash when sending very long messages.
o Fix a bug where UTF-8 status messages get garbled when going idle.