change in focus protocol, use new proprietary variant

libs/strophe/strophe.jingle.sessionbase.js

     var modify = $iq({to: toJid, type: 'set'})
         .c('jingle', {
             xmlns: 'urn:xmpp:jingle:1',
-            //action: isAdd ? 'source-add' : 'source-remove', -- not yet
-            action: isAdd ? 'addsource' : 'removesource',
+            action: isAdd ? 'source-add' : 'source-remove', -- not yet
             initiator: initiator,
             sid: sid
         }
         var channel = sdpMediaSsrcs[channelNum];
         modify.c('content', {name: channel.mediaType});
 
-        // modify.c('description', {xmlns:'urn:xmpp:jingle:apps:rtp:1', media: channel.mediaType}); -- not yet
+        modify.c('description', {xmlns:'urn:xmpp:jingle:apps:rtp:1', media: channel.mediaType});
         // FIXME: not completly sure this operates on blocks and / or handles different ssrcs correctly
         // generate sources from lines
         Object.keys(channel.ssrcs).forEach(function(ssrcNum) {
             });
             modify.up(); // end of source
         });
-        // modify.up(); // end of description -- not yet
+        modify.up(); // end of description
         modify.up(); // end of content
     });
     if (modified) {