[Pidgin] #5649: Add "list" command for xmpp conversation

[Pidgin]

#5649: Add "list" command for xmpp conversation
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Reporter:  nops   |       Owner:  nwalp       
    Type:  patch  |      Status:  new         
Priority:  minor  |   Component:  XMPP        
 Version:  2.4.1  |    Keywords:  list command
 Pending:  0      |  
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 This patch (get from 2.4.1 source code by command diff -u) add to Jabber
 conversation text command \list with definition:
 {{{
 list <owner|admin|member|outcast>
 }}}

 This allow to see list of user affiliates in the current room.
 About this command was mentioned in ticket #119.

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Ticket URL: <http://developer.pidgin.im/ticket/5649>
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