loose assertions on _messenger.ConnectionCount() in brpc_channel_unittest.cpp due to a race condition

serialized as empty

call_id cannot be destroyed(via RPC interfaces) before being used by a RPC & Replace Controller._run_done_state with more general allow_done_to_run_in_place

Update redis_client.md

r35401: Refactored interruptions on bthreads. The semantic is more similar to pthread's and EINTR is returned instead of ESTOP.