MDL-39387 fix /auth phpdocs

auth/imap/auth.php

@@ -1,15 +1,26 @@
 <?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
 /**
- * @author Martin Dougiamas
- * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
- * @package moodle multiauth
- *
  * Authentication Plugin: IMAP Authentication
- *
  * Authenticates against an IMAP server.
  *
- * 2006-08-31  File created.
+ * @package auth_imap
+ * @author Martin Dougiamas
+ * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
  */
 
 if (!defined('MOODLE_INTERNAL')) {