update Smarty to version 3.1.21

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>

lib/classes/Smarty-3.1.21/libs/plugins/modifiercompiler.upper.php

@@ -0,0 +1,29 @@
+<?php
+/**
+ * Smarty plugin
+ *
+ * @package    Smarty
+ * @subpackage PluginsModifierCompiler
+ */
+
+/**
+ * Smarty upper modifier plugin
+ * Type:     modifier<br>
+ * Name:     lower<br>
+ * Purpose:  convert string to uppercase
+ *
+ * @link   http://smarty.php.net/manual/en/language.modifier.upper.php lower (Smarty online manual)
+ * @author Uwe Tews
+ *
+ * @param array $params parameters
+ *
+ * @return string with compiled code
+ */
+function smarty_modifiercompiler_upper($params)
+{
+    if (Smarty::$_MBSTRING) {
+        return 'mb_strtoupper(' . $params[0] . ', \'' . addslashes(Smarty::$_CHARSET) . '\')';
+    }
+    // no MBString fallback
+    return 'strtoupper(' . $params[0] . ')';
+}