[Pidgin] #15122: add dconf support: usability down in GNOME3 env.

[Pidgin]

#15122: add dconf support: usability down in GNOME3 env.
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 Reporter:  ildar         |     Owner:  rekkanoryo
     Type:  defect        |    Status:  new       
Component:  unclassified  |   Version:  2.10.3    
 Keywords:                |  
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 GNOME3 is in the house already, but pidgin still isn't ready for it.
 1. pidgin uses GConf2 which is deprecated. Sooner or later pidgin should
 switch to dconf.
 2. In Gnome3 env. PROXY settings are in dconf, not GConf. I.e. if you
 switch proxy settings in Gnome3, pidgin will not see that AND there's no
 GUI prog to change proxy settings in GConf (just gconf-editor, but I don't
 count it).

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Ticket URL: <http://developer.pidgin.im/ticket/15122>
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