Port PHP4 style classes to PHP5

The next version of PHP will deprecated the PHP4 style classes.

References: KW-99

php/class.pluginmdmmodule.php

@@ -19,9 +19,9 @@ class PluginMDMModule extends Module
 	 * @param int $id unique id.
 	 * @param array $data list of all actions.
 	 */
-	function PluginMDMModule($id, $data)
+	function __construct($id, $data)
 	{
-		parent::Module($id, $data);
+		parent::__construct($id, $data);
 
 		$this->server = (PLUGIN_MDM_SERVER_SSL ? 'https://' : 'http://') . PLUGIN_MDM_SERVER;