Added Kohana v3.0.8

includes/kohana/system/utf8/rtrim.php

@@ -0,0 +1,22 @@
+<?php defined('SYSPATH') or die('No direct script access.');
+/**
+ * UTF8::rtrim
+ *
+ * @package    Kohana
+ * @author     Kohana Team
+ * @copyright  (c) 2007-2008 Kohana Team
+ * @copyright  (c) 2005 Harry Fuecks
+ * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt
+ */
+function _rtrim($str, $charlist = NULL)
+{
+	if ($charlist === NULL)
+		return rtrim($str);
+
+	if (UTF8::is_ascii($charlist))
+		return rtrim($str, $charlist);
+
+	$charlist = preg_replace('#[-\[\]:\\\\^/]#', '\\\\$0', $charlist);
+
+	return preg_replace('/['.$charlist.']++$/uD', '', $str);
+}