implementing permission roles

- copy permissions (adding groups)
- copy permissions (adding forums)
- checking proper groupadd/del settings
- added intro page to permissions (to give an overview and quick links)
- able to select forums + subforums, single forum, all groups, all users (permission screens)
- able to reset permissions (only reset input field)
- fix forum deletion bug


git-svn-id: file:///svn/phpbb/trunk@5574 89ea8834-ac86-4346-8a33-228a782c2dd0

phpBB/includes/db/dbal.php

@@ -130,6 +130,7 @@ class dbal
 				}
 				else if (is_array($var) && is_string($var[0]))
 				{
+					// This is used for INSERT_SELECT(s)
 					$values[] = $var[0];
 				}
 				else