MB-10083 Expose memcached SSL port.

Change-Id: Ib9d215824d02126921f25734acf609748b8e4b99
Reviewed-on: http://review.couchbase.org/33546
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>