[Pidgin] #3462: Add @see @ref comments to the tops of various modules referencing their corresponding signals documentation files

[Pidgin]

#3462: Add @see @ref comments to the tops of various modules referencing their
corresponding signals documentation files
---------------------------+------------------------------------------------
  Reporter:  nix_nix       |       Owner:  lschiere
      Type:  patch         |      Status:  closed  
  Priority:  minor         |   Milestone:  2.2.2   
 Component:  unclassified  |     Version:  2.2.1   
Resolution:  fixed         |    Keywords:          
   Pending:  0             |  
---------------------------+------------------------------------------------
Changes (by resiak at soc.pidgin.im):

  * milestone:  => 2.2.2

Comment:

 (In [7252a43314152ad33cc6dc4d65c0349a16575b81]) Patch from nix_nix to add
 some links to signal documentation.

 Fixes #3462.

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Ticket URL: </ticket/3462#comment:2>
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