Added example for authenticating

Updated changelog

ChangeLog

@@ -2,6 +2,9 @@
 	* Added: Added a very simple example for implementing a mapping to PHP
 	  file streams. This should allow easy implementation of for example a
 	  WebDAV to FTP proxy.
+	* Added: HTTP Basic Authentication helper class.
+	* Added: Sabre_HTTP_Reponse class. This centralizes HTTP operations and
+	  will be a start towards the creating of a testing framework.
 	* Updated: Backwards compatibility break: all require_once() statements
 	  are removed
 	  from all the files. It is now recommended to use autoloading of 

examples/authenticating.php

@@ -0,0 +1,28 @@
+<?php
+
+// !!!! Make sure the Sabre directory is in the include_path !!!
+
+// {$Id$} //
+
+// settings
+date_default_timezone_set('Canada/Eastern');
+
+// Files we need
+require_once 'Sabre.includes.php';
+
+$u = 'admin';
+$p = '1234';
+
+$auth = new Sabre_HTTP_BasicAuth();
+
+$result = $auth->getUserPass();
+
+if (!$result || $result[0]!=$u || $result[1]!=$p) {
+
+    $auth->requireLogin();
+    echo "Authentication required\n";
+    die();
+
+}
+
+?>