Tell google to not index error pages

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@1315 44740490-163a-0410-bde0-09ae8108e29a

templates/error.php

 <?php 
 	$this->data['header'] = $this->t('error_header');
 	$this->data['icon'] = 'bomb_l.png';
+	
+	$this->data['head'] = '
+<meta name="robots" content="noindex, nofollow" />
+<meta name="googlebot" content="noarchive, nofollow" />';
+	
 	$this->includeAtTemplateBase('includes/header.php'); 
 ?>