[Pidgin] #8584: Purple::Util::fetch_url() needs an additional parameter to pass the user data to callback function.

[Pidgin]

#8584: Purple::Util::fetch_url() needs an additional parameter to pass the user
data to callback function.
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     Reporter:  linleno  |        Type:  plugin request         
       Status:  new      |   Component:  libpurple              
      Version:  2.5.5    |    Keywords:  perl, plugin, fetch_url
Launchpad_bug:           |  
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 For now, the only parameter the callback function get is the url content.
 There should be one additional parameter of Purple::Util::fetch_url() to
 let user be able to pass user data to the callback function.

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Ticket URL: <http://developer.pidgin.im/ticket/8584>
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