nsqd: fix IDENTIFY msg_timeout response
Merge pull request #365 from segmentio/nsqd/fix-msg_timeout

nsqd: fix IDENTIFY msg_timeout response
modified bench.sh to support common benchmark configuration values
Merge pull request #368 from sgeller/master

modified bench.sh to support common benchmark configuration values
nsqd auth protocol support

* support AUTH command, and configurable auth-endpoints to enable
* apply auth state against SUB/PUB/MPUB
* echo identity back to client, and in stats