Problem: ``SET PASSWORD FOR foo@localhost'' was written into
binary log using double quites: ``SET PASSWORD FOR "foo"@"localhost"...''.
If sql_mode was set to ANSI_QUOTES, parser on slave considered
"foo" and "localhost" as identifiers instead of strigns constants,
so it failed to parse, generated syntax error and slave then stopped.
Fix: changing binary log entries to use single quotes:
``SET PASSWORD FOR 'foo'@'localhost'...'' not to depend on ANSI_QUOTES.


mysql-test/r/rpl_do_grant.result:
  Adding test case
mysql-test/t/rpl_do_grant.test:
  Adding test case
sql/sql_acl.cc:
  Using single quotes instead of double quotes,
  not to fails when sql_mode=ANSI_QUOTES.