[Pidgin] #5762: Fix mail handling

[Pidgin]

#5762: Fix mail handling
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  Reporter:  felipec  |       Owner:  QuLogic
      Type:  patch    |      Status:  new    
  Priority:  minor    |   Milestone:         
 Component:  MSN      |     Version:  2.4.1  
Resolution:           |    Keywords:         
   Pending:  0        |  
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Comment (by qulogic at pidgin.im):

 (In [5e33eda76b698c04377f5ad6cdd3ad1ec87d2eff]):[[BR]]
 Fixup MSN mailbox handling based on a patch from Felipe, plus various
 other things that I cleaned up in the URL command handler.

 Updates are now made after at least 750 seconds because Felipe found
 that to be the magic value, and updating every time we receive a QNG is
 totally unreliable. They aren't even received when using the HTTP
 method, for example.

 Opening the inbox is now always available. I'm not sure why it was
 limited to just @hotmail.com and @msn.com, but I certainly haven't been
 testing with either of those. I think the correct way to determine if
 an inbox exists is to just use the URL command and see, but I don't
 have one of those no-inbox accounts.

 The initial email notification is no longer called explicitly for
 @hotmail.com and @msn.com accounts. I, at least, get an initial mail
 notification, but the rest of Felipe's patch negates the need to do
 this, anyway.

 References #5762.

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Ticket URL: <http://developer.pidgin.im/ticket/5762#comment:8>
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