Get jabber id from a PurpleConvChatBuddy.

[Sadrul Habib Chowdhury]

* Benjamin Arnaud had this to say on [21 Mar 2008, 19:38:49 +0100]:
> Hey there, I'm coding a Qt client using libpurple.
> I'm trying to retrieve a jabber ID (eg: John at jabber.com) from a PurpleConvChatBuddy.
> 
> Is there any way to do so using purple ?

It looks like currently it's not doable. However, once #3420 is
resolved, it should be possible. I am not entirely sure a bump in the
major is required either. I'll try to see if it can be added in 2.x
without breaking anything.

Sadrul