Differentiate between different unix sockets during monitor output
Fixed race causing SYNCNOW to return invalid response once in a while. See https://groups.google.com/forum/#!topic/redis-db/Unt_Q8ametQ and a better (untested) solution here: https://github.com/antirez/redis/commit/89ffba9133bc78f6c797d248f22335da490d20d0#src/replication.c