fix logstate.EngineTracer

darcs-hash:20090310152830-b2873-c4ae8a77cea8c94aa41c15e47cdbf3d61115ba02
msrp_send_message_lowlevel.py: wait for msrp response before exiting

darcs-hash:20090311062701-b2873-181c21bade751b55febfa009d5b535c5d46bc984