[Pidgin] #3319: MSN group name display support

[Pidgin]

#3319: MSN group name display support
------------------------+---------------------------------------------------
Reporter:  manphiz      |       Owner:  khc      
    Type:  enhancement  |      Status:  new      
Priority:  minor        |   Component:  MSN      
 Version:  2.2.0        |    Keywords:  msn group
 Pending:  0            |  
------------------------+---------------------------------------------------
 MSN group support[1] is recently added to MSN, and further expanded by
 other usage, such as xiaoi and bbqun, which is mainly used in China. It's
 becoming more and more prevalent. The current mechanism is performed as a
 bot who forwards messages to all registered members. Since it has it's own
 passport name, the messages forwarded display this name instead of the
 original sender's name.

 The original patch comes from Gene[2], who finds the message is carrying
 an additional property "P4-Context" in message header, which in turn
 contains the original sender's name. The patch is attached below. The
 current approach is provided by inlining the sender's name in the message,
 which is quick and dirty, but works. Hope someone's willing to provide a
 refinement with full support of MSN group.

 [1] http://groups.msn.com/

 [2] http://www.iuiuiu.com/plog/post/1/337

-- 
Ticket URL: <http://developer.pidgin.im/ticket/3319>
Pidgin <http://pidgin.im>
Pidgin