MDL-21249 improved php docs and adding copyright blocks in mod/folder

mod/folder/mod_form.php

@@ -18,14 +18,13 @@
 /**
  * Folder configuration form
  *
- * @package   mod-folder
- * @copyright 2009 Petr Skoda (http://skodak.org)
- * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ * @package    mod
+ * @subpackage folder
+ * @copyright  2009 Petr Skoda  {@link http://skodak.org}
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
-if (!defined('MOODLE_INTERNAL')) {
-    die('Direct access to this script is forbidden.');    ///  It must be included from a Moodle page
-}
+defined('MOODLE_INTERNAL') || die();
 
 require_once ($CFG->dirroot.'/course/moodleform_mod.php');