skypiax: added 'report_incoming_chatmessages' configuration file per_interface setting. To activate it, put its value to '1' or 'true', any other value will be 'false'. Defualts to 'true'
git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@15343 d0543943-73ff-0310-b7d9-9358b9ac24b2
