Add info message if the other side closed the connection
Add info message if the other side closed the connection

Change-Id: Ia0ad2d830899c5b55916742a840bbaecc1e29795
Reviewed-on: http://review.couchbase.org/75536
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Oliver Downard <2b519a6943d9144e0afb0b62d71fdc5e98fa8017@couchbase.com>
Reviewed-by: Jim Walker <1cd02e31b43620d7c664e038ca42a060d61727b9@couchbase.com>

daverigby/kv_engine,daverigby/memcached,daverigby/kv_engine,daverigby/kv_engine,daverigby/memcached,couchbase/memcached,daverigby/kv_engine,daverigby/memcached,daverigby/memcached,couchbase/memcached,couchbase/memcached,couchbase/memcached