Add lib/utils.php file

Added simple shell/utf/html escape checking
Added a collection of test cases (we need some more escape checking ones)

Signed-off-by: Diederik de Groot <ddegroot@talon.nl>

lib/utils.php

@@ -0,0 +1,10 @@
+<?php
+//
+// Helper functions
+//
+
+function utf8_urldecode($str) {
+	$str = preg_replace("/%u([0-9a-f]{3,4})/i","&#x\\1;",urldecode($str));
+	return html_entity_decode($str,null,'UTF-8');;
+}
+?>