Author: Sam Hemelryk
MDL-48506 cachestore_memcached: added upgrade notice
http://git.moodle.org/gw?p=moodle.git;a=commit;h=7797d7ead0c628cbff2bf888cb7eef621350ab08
http://github.com/moodle/moodle/commit/7797d7ead0c628cbff2bf888cb7eef621350ab08
+ 3.1 en [notice,cachestore_memcached]
+ 3.1 en [upgrade200recommended,cachestore_memcached]