[patch] xchat in common tasks

[Carl Karsten]

 > I think I read somewhere that xchat-gnome is no longer installed by
correct.

 > default and I can't see it as a dependency of any of the meta packages.
 > I've patched the desktop guide to tell the user to install it.

good.  There is still the irc://chat.freenode.com/ubuntu link on the opening 
FireFox file page - maybe that should be pulled, or made a link to an 'install 
irc chat client' page.

^CarlFK