Added print_control_keys function in sip_audio_session

darcs-hash:20090115130912-1e3d8-33bc346b93d9c25eac8172312e2fb50a46d145ac
Fixed missing imports in XML applications

darcs-hash:20090115131434-1e3d8-68e4d4c463d695d6867f5619094331030c9d695c