configure.in:
  new configure parameter (now only for embeded server)
include/my_global.h:
  now query cache always included in server, because of problrms with test suit
mysql-test/r/flush.result:
  removed double testing
mysql-test/t/flush.test:
  removed double testing
mysql-test/t/grant_cache.test:
  now it is only memo about query cache
mysql-test/t/query_cache.test:
  now it is only memo about query cache