Log Message:
Update pidgin to 2.10.4.

version 2.10.4 (05/06/2012):
	General:
	* Support building against Farstream in addition to Farsight.
	  (Olivier Crete) (#14936)

	IRC:
	* Disable periodic WHO timer.  IRC channel user lists will no
	  longer automatically display away status, but libpurple will be
	  much kinder to the network.
	* Print unknown numerics to channel windows if we can associate
	  them.  Thanks to Marien Zwart. (#15090)

	MSN:
	* Fix a possible crash when receiving messages with certain characters
	  or character encodings.  Thanks to Fabian Yamaguchi for reporting
	  this!

	XMPP:
	* Fix a possible crash when receiving a series of specially crafted
	  file transfer requests.  Thanks to José Valentín Gutiérrez for
	  reporting this!  (CVE-2012-2214)

	Windows-Specific Changes:
	* Words added to spell check dictionaries are saved across restarts of
	  Pidgin (#11886)