Merge pull request #16819 from tashik/fix-storage-adapter-libmemcached

fix #16818: override memcached options correctly

Author: niden

phalcon/Storage/Adapter/Libmemcached.zep

@@ -136,7 +136,7 @@ class Libmemcached extends AbstractAdapter
                         \Memcached::OPT_REMOVE_FAILED_SERVERS : true,
                         \Memcached::OPT_RETRY_TIMEOUT         : 1
                     ],
-                    client   = array_merge(failover, client);
+                    client   = array_replace(failover, client);
 
                 this
                     ->setOptions(connection, client)