Update irc/xchat to latest (2.6.4) version. Maintainer is CC'd.
	From the Changelog:
	- Updated translations (de, el, es, gl, hu, nl, sv, vi, zh_TW)
	- Fixed opening a irc:// URL via "xchat -a --url=abc123" command
	  while "Skip serverlist on startup" is off. This fix is only
	  relevant whenopening an initial instance of xchat (i.e not via dbus).
	- Fixed the tree layout "flashing" (redrawing slowly) after you
	  switched to tabs and back to tree.
	- Fixed plugin/script get_list("users") causing a critical GDK warning
	  when not executed from the front-most tab.
	- Added spelling support in the input-box via GTKSpell.
	- Improved the error reporting when connecting through a Socks proxy.
	- DCC file transfers via http/socks45/wingate proxy is now supported
	- Fixed Socks 5 failing on 64-bit CPUs.
	- Added support for connecting through a Microsoft ISA Proxy,
	  requires libntlm at build time
	- You can now mark and copy timestamps if you hold down SHIFT.
	- Timestamps are now preserved in the /lastlog command. Also fixed a
	  bug where the separator line disappeared during /lastlog.
	- Added a Browse button to the DCC download folder setting.
	- Made the setup window a little neater and Gnome-like.
	- Improved the notify window a little and fixed a small memory leak.
	- Fixed CTCPs being truncated in the RawLog window.
	- Added an option to open a "Save As..." dialog when receiving a
	  DCC file offer.
	- Fixed a crash if you try to remove a network from the list while
	  it's in a auto-reconnect delay [debian bug #364858].
	- Python: Fixed some memory usage bugs.
	- Perl: Turned on utf8 flag for things that should have it on.