Propagate error from find_cluster_by_name correctly.

Change-Id: I2a98731905b0d22b9bfcb7608e1ecd060a781f35
Reviewed-on: http://review.couchbase.org/36755
Tested-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Increase listen socket backlogs for ssl proxy.

Change-Id: If965b9564d363c58065d05b0d9e1a35bea100422
Reviewed-on: http://review.couchbase.org/36756
Tested-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>