/** @page connection-signals Connection Signals

 @signals
  @signal signing-on
  @signal signed-on
  @signal autojoin
  @signal signing-off
  @signal signed-off
  @signal connection-error
 @endsignals

 @see connection.h

 <hr>

 @signaldef signing-on
  @signalproto
void (*signing_on)(PurpleConnection *gc);
  @endsignalproto
  @signaldesc
   Emitted when a connection is about to sign on.
  @param gc The connection that is about to sign on.
 @endsignaldef

 @signaldef signed-on
  @signalproto
void (*signed_on)(PurpleConnection *gc);
  @endsignalproto
  @signaldesc
   Emitted when a connection has signed on.
  @param gc The connection that has signed on.
 @endsignaldef

 @signaldef autojoin
  @signalproto
gboolean (*autojoin)(PurpleConnection *gc);
  @endsignalproto
  @signaldesc
   Emitted when a connection has signed on, after the signed-on signal, to
   signal UIs to autojoin chats if they wish.  UIs should connect to this
   with @c PURPLE_SIGNAL_PRIORITY_HIGHEST to allow plugins to block this
   signal before the UI sees it and then re-emit it later.
  @param gc The connection that has signed on.
  @return @c TRUE if the signal was handled or @c FALSE otherwise.  In
          practice, the return value is irrelevant, as it really only
          exists so plugins can block the UI's autojoin.
  @since 2.7.0
 @endsignaldef

 @signaldef signing-off
  @signalproto
void (*signing_off)(PurpleConnection *gc);
  @endsignalproto
  @signaldesc
   Emitted when a connection is about to sign off.
  @param gc The connection that is about to sign off.
 @endsignaldef

 @signaldef signed-off
  @signalproto
void (*signed_off)(PurpleConnection *gc);
  @endsignalproto
  @signaldesc
   Emitted when a connection has signed off.
  @param gc The connection that has signed off.
 @endsignaldef

 @signaldef connection-error
  @signalproto
void (*connection_error)(PurpleConnection *gc, PurpleConnectionError err, const gchar *desc)
  @endsignalproto
  @signaldesc
   Emitted when a connection error occurs, before @ref signed-off.
   @param gc     The connection on which the error has occurred
   @param err    The error that occurred
   @param desc   A description of the error, giving more information.
 @endsignaldef

 */
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