[Pidgin] #3173: Update XMPP prpl to use attention API

[Pidgin]

#3173: Update XMPP prpl to use attention API
-----------------------------------------+----------------------------------
 Reporter:  jeff                         |        Owner:  malu
     Type:  patch                        |       Status:  new 
Milestone:  Patches Needing Improvement  |    Component:  XMPP
  Version:  2.2.0                        |   Resolution:      
 Keywords:  attention xmpp               |  
-----------------------------------------+----------------------------------

Comment(by phannent):

 I just tried to /buzz Twain28 and it failed.  He had just downloaded my
 windows build from this morning (the same build I was running).  He could
 buzz me but not the other way around.  I logged off and on again but it
 made no difference.

 See the attached log.

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Ticket URL: <http://developer.pidgin.im/ticket/3173#comment:9>
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