Replace the DOCUMENT_ROOT and PROJECT_ROOT variables

Use the __DIR__ constant and dirname as needed

core/upgrade/upgrade_domains.php

@@ -28,7 +28,6 @@
 	if(defined('STDIN')) {
 		//includes files
 		require_once dirname(__DIR__, 2) . "/resources/require.php";
-		$_SERVER["DOCUMENT_ROOT"] = $document_root;
 		$display_type = 'text'; //html, text
 	}
 	else if (!$included) {