Default to display_errors false

config.sample.php

 <?php
 
-ini_set('display_errors',true);
+ini_set('display_errors', false);
 error_reporting(E_ALL);
 
 set_include_path(dirname(__FILE__).'/src:'.dirname(__FILE__).'/lib/php:'.get_include_path());
 
-require_once 'UNL/Autoload.php';
\ No newline at end of file
+require_once 'UNL/Autoload.php';