[Pidgin] #4875: MSNP15 does not update tokens correctly.

[Pidgin]

#4875: MSNP15 does not update tokens correctly.
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  Reporter:  QuLogic  |       Owner:  khc             
      Type:  patch    |      Status:  new             
  Priority:  minor    |   Milestone:  Activate MSNPV14
 Component:  MSN      |     Version:                  
Resolution:           |    Keywords:                  
   Pending:  0        |  
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Comment (by QuLogic):

 OK, this patch should update the contact token when operations return a
 `q0:BadContextToken` error. For other errors, it should print something to
 the debug window only, because we have no idea what to do with it.

 I pretty much just tacked on a few things to the MsnCallbackState
 structure. Everything was updated to refer to one single function and
 callback which takes care of things. Because of the way
 `xmlnode_insert_node` ended up working, I had to remove the & from
 `msn_nexus_get_token_str`, so OIM's will probably be broken. I'll take
 care of the OIM's next, so it shouldn't be too big of a problem.

 I didn't change the address book operations, because I assume they only
 happen at login time, and thus should never have an expired token.

-- 
Ticket URL: <http://developer.pidgin.im/ticket/4875#comment:6>
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