give decent error message when config file does not exists

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@343 44740490-163a-0410-bde0-09ae8108e29a

lib/SimpleSAML/Configuration.php

@@ -30,6 +30,9 @@ class SimpleSAML_Configuration {
 	}
 
 	private function loadConfig() {
+		if (!file_exists($this->configpath . '/config.php')) {
+			echo 'You have not yet created a configuration file. [ <a href="http://rnd.feide.no/content/installing-simplesamlphp#id405868">simpleSAMLphp installation manual</a> ]';
+		}
 		require_once($this->configpath . '/config.php');
 		$this->configuration = $config;
 	}

www/_include.php

@@ -26,7 +26,8 @@ ini_set('include_path', $path);
 
 require_once('SimpleSAML/Configuration.php');
 
-SimpleSAML_Configuration::init(dirname(dirname(__FILE__)) . '/config');
+$configdir = dirname(dirname(__FILE__)) . '/config';
+SimpleSAML_Configuration::init($configdir);