Status/action for the resolver's cache. enabled(1) means that the use of the cache is allowed. Query operations can return this state. disabled(2) means that the cache is not being used. Query operations can return this state. Setting this variable to clear(3) deletes the entire contents of the resolver's cache, but does not otherwise change the resolver's state. The status will retain its previous value from before the clear operation (i.e., enabled(1) or disabled(2)). The value of clear(3) can NOT be returned by a query operation.