[ticket/13192] Remove app.php on mod rewrite even if app.php is outside root

PHPBB3-13192

tests/path_helper/path_helper_test.php

@@ -432,6 +432,8 @@ class phpbb_path_helper_test extends phpbb_test_case
 			array('foo/index', false, 'foo/index'),
 			array('app.php/foo', false, 'app.php/foo'),
 			array('app.php/foo', true, 'foo'),
+			array('/../app.php/foo', false, '../app.php/foo'),
+			array('/../app.php/foo', true, '../foo'),
 		);
 	}