Add missing docblock.

setup/validate.php

@@ -1,4 +1,17 @@
 <?php
+/**
+ * Validation callback.
+ *
+ * @package    phpMyAdmin-setup
+ * @author     Piotr Przybylski <piotrprz@gmail.com>
+ * @copyright  Copyright (c) 2008, Piotr Przybylski <piotrprz@gmail.com>
+ * @license    http://www.gnu.org/licenses/gpl.html GNU GPL 2.0
+ * @version    $Id$
+ */
+
+/**
+ * Core libraries.
+ */
 require './lib/common.inc.php';
 
 $validators = array();