Added GRANT privilege ON database.* TO role; functionality

sql/sql_acl.cc

@@ -3255,10 +3255,14 @@ static int replace_db_table(TABLE *table, const char *db,
 
   /* Check if there is such a user in user table in memory? */
   if (!find_user_no_anon(combo.host.str,combo.user.str, FALSE))
+  {
+    /* The user could be a role, check if the user is registered as a role */
+    if (!combo.host.length && !find_acl_role(combo.user.str))
     {
       my_message(ER_PASSWORD_NO_MATCH, ER(ER_PASSWORD_NO_MATCH), MYF(0));
       DBUG_RETURN(-1);
     }
+  }
 
   table->use_all_columns();
   table->field[0]->store(combo.host.str,combo.host.length,