Update Smarty to v2.6.31 (fix compatibility with PHP 7.2)

onyx2/modules/templates/smarty/plugins/modifier.nl2br.php

@@ -0,0 +1,35 @@
+<?php
+/**
+ * Smarty plugin
+ * @package Smarty
+ * @subpackage plugins
+ */
+
+
+/**
+ * Smarty plugin
+ *
+ * Type:     modifier<br>
+ * Name:     nl2br<br>
+ * Date:     Feb 26, 2003
+ * Purpose:  convert \r\n, \r or \n to <<br>>
+ * Input:<br>
+ *         - contents = contents to replace
+ *         - preceed_test = if true, includes preceeding break tags
+ *           in replacement
+ * Example:  {$text|nl2br}
+ * @link http://smarty.php.net/manual/en/language.modifier.nl2br.php
+ *          nl2br (Smarty online manual)
+ * @version  1.0
+ * @author   Monte Ohrt <monte at ohrt dot com>
+ * @param string
+ * @return string
+ */
+function smarty_modifier_nl2br($string)
+{
+    return nl2br($string);
+}
+
+/* vim: set expandtab: */
+
+?>