[Pidgin] #4382: Update to MSNP15

[Pidgin]

#4382: Update to MSNP15
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Reporter:  QuLogic  |       Owner:  khc                            
    Type:  patch    |      Status:  new                            
Priority:  minor    |   Component:  MSN                            
 Version:  2.3.1    |    Keywords:  MSNP15, ticket tokens, RPS, SSO
 Pending:  0        |  
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 So khc wanted to take a look at the MSNP15 stuff, so I'm posting these
 tickets.

 These patches add support for logging in with MSNP15.

 The first patch changes some miscellaneous items to refer to MSNP15
 instead of MSNP13. It updates the requested protocol version, as well as
 the challenge responses.

 The second patch adds RPS/SSO authentication to login. It depends on the
 Triple-DES cipher and HMAC digest in tickets #4380 and #4381. There's not
 much else to say about that.

 Finally, the third patch updates the contact SOAP operations to use Ticket
 Tokens instead of MSPAuth. I guess this isn't strictly necessary, but
 without it there'd be nothing in your buddy list. While I was at it, I
 also reformatted contact.h so the XML looks nicer.

 What's tested:
  * Signing in/out
  * Adding/removing buddies
  * Moving buddies between groups
  * Adding groups
   * If I try to move a buddy to a new group, the group is created, but
 then when moving the buddy, the group name seems to be forgotten. I
 haven't had time to check what's wrong here.

 Not tested:
  * Anything with Yahoo! buddies

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Ticket URL: <http://developer.pidgin.im/ticket/4382>
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