[Pidgin] #15508: Support for XEP-0280: Message Carbons

[Pidgin]

#15508: Support for XEP-0280: Message Carbons
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 Reporter:  xnyhps                  |       Owner:  deryni
     Type:  patch                   |      Status:  new
Milestone:  Patches Needing Review  |   Component:  XMPP
  Version:  2.10.6                  |  Resolution:
 Keywords:  xmpp carbons jabber     |
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Comment (by EionRobb):

 Whilst technically correct, I've found the use of serv_got_im(...,
 PURPLE_MESSAGE_SEND) isn't well supported by UI, and other prpl's will use
 purple_write_conversation() instead.  In Pidgin in particular the use of
 _write_conversation() will colour the text in Blue as if it were sent from
 the client and won't trigger the 'outgoing IM' sound.  In Adium, the
 message will be displayed (as opposed to using serv_got_im() which will
 not display the message at all).

 In a semi-unrelated note, has anyone tried turning this into a plugin
 instead?

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Ticket URL: <https://developer.pidgin.im/ticket/15508#comment:40>
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