Update Smarty to 3.1.21

- add missing block.tphp, block.textformat.php, function.popup.php,
  function.popup_init.php
- update function in function.html_checkboxes.php,
  function.html_options.php

www/Smarty-3.1.21/sysplugins/smarty_resource_uncompiled.php

@@ -0,0 +1,41 @@
+<?php
+/**
+ * Smarty Resource Plugin
+ *
+ * @package    Smarty
+ * @subpackage TemplateResources
+ * @author     Rodney Rehm
+ */
+
+/**
+ * Smarty Resource Plugin
+ * Base implementation for resource plugins that don't use the compiler
+ *
+ * @package    Smarty
+ * @subpackage TemplateResources
+ */
+abstract class Smarty_Resource_Uncompiled extends Smarty_Resource
+{
+    /**
+     * Render and output the template (without using the compiler)
+     *
+     * @param  Smarty_Template_Source   $source    source object
+     * @param  Smarty_Internal_Template $_template template object
+     *
+     * @throws SmartyException          on failure
+     */
+    abstract public function renderUncompiled(Smarty_Template_Source $source, Smarty_Internal_Template $_template);
+
+    /**
+     * populate compiled object with compiled filepath
+     *
+     * @param Smarty_Template_Compiled $compiled  compiled object
+     * @param Smarty_Internal_Template $_template template object (is ignored)
+     */
+    public function populateCompiledFilepath(Smarty_Template_Compiled $compiled, Smarty_Internal_Template $_template)
+    {
+        $compiled->filepath = false;
+        $compiled->timestamp = false;
+        $compiled->exists = false;
+    }
+}