Removes old trap on invalid stream ID
Fixes attribute cleanup - was missing a match. 

Could remove the entry when it was still needed, thus 
causing an attribute with stream ID of zero
Updates attribute match to work for Listener also.
Disable forwarding and shaper on Talker leave
Fix for Listener proxy leave on wrong port.
Fixes potential duplication of Talker attributes if present.
Prevents duplication of Listener attributes if present. 

The Talker attribute may not be present because it has 
been cleaned up.
Fix formatting of debug print.