Sometimes you want direct a menu item in Drupal to a location using a relative link. You cannot use <front>/{location} because Drupal validates the link. When you add a new link, the link is validated using menu_edit_item_validate(), it returns true when:  the path is <front> (<front>/directory, or similar paths are excluded); the path is an external path (the function url_is_external() returns TRUE); the path is associated...