Adding external referenses for doxygen

See http://www.asterisk.org/doxygen/trunk/extref.html


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@63230 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_jingle.c

@@ -21,6 +21,8 @@
  * \author Matt O'Gorman <mogorman@digium.com>
  *
  * \brief Jingle Channel Driver
+ *
+ * \extref Iksemel http://iksemel.jabberstudio.org/
  * 
  * \ingroup channel_drivers
  */

res/res_jabber.c

@@ -19,6 +19,8 @@
 /*! \file
  * \brief A resource for interfacing asterisk directly as a client
  * or a component to a jabber compliant server.
+ *
+ * \extref Iksemel http://iksemel.jabberstudio.org/
  */
 
 /*** MODULEINFO