mod_rayo: allow unjoin of call without specifying call-uri, fix unjoin of call on hold so that b-leg is not hung up, allow unjoin command to b-leg
Merge branch 'v1.2.stable' of git://git.freeswitch.org/freeswitch into v1.2.stable
Merge branch 'v1.2.stable' into stable-session-api