[Pidgin] #10541: Make XMPP MUC Username case-sensitive

[Pidgin]

#10541: Make XMPP MUC Username case-sensitive
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 Reporter:  prauscher  |        Owner:  deryni
     Type:  defect     |       Status:  new   
Milestone:             |    Component:  XMPP  
  Version:  2.5.5      |   Resolution:        
 Keywords:             |  
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Comment(by mic159):

 Replying to [ticket:10541 prauscher]:
 > Following szenario:
 > * 2 Users: USER and user
 > * you are USER
 > # user renames himself to anotherusername
 >
 > pidgin will think now that you are anotherusername and enable Highlights
 and your Username to anotherusername.

 I have also run into this issue.

 User 1 enters room as testUser.
 User 2 enters room as testuser.

 User 2 renames to someName.
 Both users chat windows say "You are now known as someName" even though it
 was only User 2.

 Everyone using pidgin sees User 1's nick removed from the participant
 list, and be replaced with 'someName', and User 2's original nick with the
 lowercase letter remains.

 From now on, both users receive alerts when someone mentions User 2's name
 (even if User 1 changes their own name afterwards).

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Ticket URL: <http://developer.pidgin.im/ticket/10541#comment:1>
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