ZF-9848: Use class constant instead of string

Description

In Zend_Cache_Backend_Memcached.php is a constant defined



but it is not used everywhere:

if (count($tags) > 0) { $this->_log("Zend_Cache_Backend_Memcached::save() : tags are unsupported by the Memcached backend"); }



This could be replaced by

if (count($tags) > 0) { $this->_log(self::TAGS_UNSUPPORTED_BY_SAVE_OF_MEMCACHED_BACKEND); }```

Comments

fixed in r22207 (trunk) & r22208 (1.10 branch)