[Pidgin] #6589: Add UDP connections to purple_proxy_connect

[Pidgin]

#6589: Add UDP connections to purple_proxy_connect
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 Reporter:  ccpaging                     |        Owner:           
     Type:  patch                        |       Status:  new      
Milestone:  Patches Needing Improvement  |    Component:  libpurple
  Version:  2.4.3                        |   Resolution:           
 Keywords:  UDP proxy                    |  
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Comment(by ccpaging):

 1. Add new function purple_proxy_connect_udp
 2. Add new enum __socket_type to PurpleProxyConnectData
 3. No user-visible setting UDP

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Ticket URL: <http://developer.pidgin.im/ticket/6589#comment:9>
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