CCCP: connmgr_put on UNKNOWN_COMMAND

Change-Id: I5c5757035291d83294b7810f9e3dda0af90ec133
Reviewed-on: http://review.couchbase.org/33451
Reviewed-by: Brett Lawson <brett19@gmail.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>