reverting "use XMPPHP/ folder instead of dirname(__FILE__) which is inefficient"

method whis relative path not work for lib - random current dir
dirname faster and not need change include_path

more info on
http://stackoverflow.com/questions/2220443/whats-better-of-requiredirname-file-myparent-php-than-just-require

XMPPHP/XMPP_Old.php

@@ -33,7 +33,7 @@
  * The old Jabber protocol wasn't standardized, so use at your own risk.
  *
  */
-require_once "XMPP.php";
+require_once dirname(__FILE__) . '/XMPP.php';
 
 	class XMPPHP_XMPPOld extends XMPPHP_XMPP {
 		/**