o in the up_command, properly use local_ip modifier, not destination_ip modifier for the lan_address;
o in the up_command, properly use local_ip modifier, not destination_ip
modifier for the lan_address;

o clarify address rewriting in the down_command().

AVOXI/b2bua,sippy/b2bua,AVOXI/b2bua,sippy/b2bua