* makeGlobalKey() is used to constructed a key that allows cached blobs from the
* same database to be re-used between wikis. For example, enwiki and frwiki will
* use the same cache keys for blobs from the wikidatawiki database, regardless of
* the cache's default key space.
* makeGlobalKey() is used to constructed a key that allows cached blobs from the
* same database to be re-used between wikis. For example, enwiki and frwiki will
* use the same cache keys for blobs from the wikidatawiki database, regardless of
* the cache's default key space.