remove disabled cache.queryHistogram, obsolete since r7981: always enable cache.queryHistogram, remove reflection hack for accessing hits counter
remove disabled cache.queryHistogram, obsolete since r7981: always enable cache.queryHistogram, remove reflection hack for accessing hits counter

git-svn-id: 9dbc6da3594b32e13bcf3b3752e372ea5bc7c2cc@8054 e7d4fc99-c606-0410-b9bf-843393a9eab7

exedio/copernica,exedio/copernica,exedio/copernica