[Pidgin] #15458: Avoid duplicate MUC history messages

[Pidgin]

#15458: Avoid duplicate MUC history messages
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 Reporter:  Kha                  |       Owner:
     Type:  patch                |      Status:  closed
Milestone:  3.0.0                |   Component:  pidgin (gtk)
  Version:                       |  Resolution:  fixed
 Keywords:  muc history backlog  |
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Comment (by Tomasz Wasilczyk <tomkiewicz@…>):

 (In [b40615082e93]):[[BR]]
 Complete support for receiving a limited amount of history when joining a
 room. Fixes #15458

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Ticket URL: <https://developer.pidgin.im/ticket/15458#comment:4>
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