Removed "./" in require statements

It does not make any sense to do that

htdocs/document.php

@@ -46,7 +46,7 @@ if (! defined('NOREQUIREAJAX')) define('NOREQUIREAJAX','1');
  */
 function llxHeader() { }
 
-require './main.inc.php';	// Load $user and permissions
+require 'main.inc.php';	// Load $user and permissions
 require_once DOL_DOCUMENT_ROOT.'/core/lib/files.lib.php';
 
 $encoding = '';