to behave well on 5.0 tables (well now you can't use tables from 4.1
and 5.0 with 4.0 because former use utf8, but still it is nice to have
similar code in acl_init() and replace_user_table()).
This also will make such GRANTs working in 5.0 (they are broken now).


mysql-test/r/grant.result:
  Added test for GRANT which manipulates user limits.
mysql-test/t/grant.test:
  Added test for GRANT which manipulates user limits.