Add support for SASL auth in mcstat
Add support for SASL auth in mcstat

Change-Id: I5a309e131e80c3a89c94a879e2a316549ea1b8a4

mrkwse/memcached,abhinavdangeti/memcached,couchbase/memcached,owendCB/memcached,daverigby/memcached,couchbase/memcached,owendCB/memcached,owendCB/memcached,abhinavdangeti/memcached,couchbase/memcached,jimwwalker/memcached,cloudrain21/memcached-1,daverigby/memcached,owendCB/memcached,cloudrain21/memcached-1,mrkwse/memcached,mrkwse/memcached,daverigby/kv_engine,abhinavdangeti/memcached,daverigby/kv_engine,abhinavdangeti/memcached,abhinavdangeti/memcached,mrkwse/memcached,cloudrain21/memcached-1,daverigby/kv_engine,daverigby/memcached,cloudrain21/memcached-1,jimwwalker/memcached,jimwwalker/memcached,daverigby/kv_engine,couchbase/memcached,daverigby/memcached