Although the query cache doesn't support retrieval of statements containing
column level access control, it was still possible to cache such statements
thus wasting memory.
  
This patch extends the access control check on the target tables to avoid
caching a statement with column level restrictions. 

Views are excepted and can be cached but only retrieved by super user account.


mysql-test/t/query_cache_with_views.test:
  Rename: mysql-test/t/view_query_cache.test -> mysql-test/t/query_cache_with_views.test
mysql-test/r/query_cache_with_views.result:
  Rename: mysql-test/r/view_query_cache.result -> mysql-test/r/query_cache_with_views.result
mysql-test/r/query_cache.result:
  Modified test case to allow caching of views
mysql-test/t/query_cache.test:
  Modified test case to allow caching of views
sql/sql_cache.cc:
  Allow caching of views