administrative statements that may alter the table, such
as REPAIR TABLE. (Bug #8480)


mysql-test/r/query_cache.result:
  Add new results
mysql-test/t/query_cache.test:
  Add regression test
sql/sql_table.cc:
  Make sure entries are flushed from the query cache for
  any administrative command run on a table that acquires
  a write lock on it (and thus might change it), like 
  REPAIR TABLE.