[Pidgin] #15538: detect IRC Roomlists outside of /list command

[Pidgin]

#15538: detect IRC Roomlists outside of /list command
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 Reporter:  cyisfor  |      Owner:  elb
     Type:  patch    |     Status:  new
Milestone:  3.0.0    |  Component:  IRC
  Version:           |   Keywords:  irc roomlist detection
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 Just a patch to have the roomlist dialog pop up whenever the IRC server
 sends a 321/322/323 room list. Sometimes it does so for commands other
 than /list, or even spontaneously. Example is on the Darkmyst IRC, "/msg
 RpgServ search something" will respond with a room list from the server.

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Ticket URL: <https://developer.pidgin.im/ticket/15538>
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