Update Markdown to v2.0.0 and other misc. changes to support PHP v8

plugins/dynamix/Vars.page

@@ -28,8 +28,10 @@ $(function() {
 <?endif;?>
 <?
 $myPage['text'] = $page['text'] = $pages['Vars']['text'] = $language = $text = $notes = $site = '...';
-ksort($GLOBALS);
-if (isset($GLOBALS['_SERVER']['PHP_AUTH_PW'])) $GLOBALS['_SERVER']['PHP_AUTH_PW'] = "***";
-echo ($display['resize'] ? "<pre class='up' style='display:none'>" : "<pre class='up'>").htmlspecialchars(print_r($GLOBALS,true))."</pre>";
+$globals = $GLOBALS;
+ksort($globals);
+if (isset($globals['_SERVER']['PHP_AUTH_PW'])) $globals['_SERVER']['PHP_AUTH_PW'] = "***";
+echo ($display['resize'] ? "<pre class='up' style='display:none'>" : "<pre class='up'>").htmlspecialchars(print_r($globals,true))."</pre>";
+phpinfo();
 ?>
 <input type="button" value="_(Done)_" onclick="done()">

plugins/dynamix/include/MarkdownExtra.inc.php

@@ -0,0 +1,17 @@
+<?php
+
+// Use this file if you cannot use class autoloading. It will include all the
+// files needed for the MarkdownExtra parser.
+//
+// Take a look at the PSR-0-compatible class autoloading implementation
+// in the Readme.php file if you want a simple autoloader setup.
+
+require_once dirname(__FILE__) . '/MarkdownInterface.php';
+require_once dirname(__FILE__) . '/Markdown.php';
+require_once dirname(__FILE__) . '/MarkdownExtra.php';
+
+// Limetech - let's make this backward-compatible with how we use it.
+use Michelf\MarkdownExtra;
+function Markdown($text) {
+    return MarkdownExtra::defaultTransform($text);
+}

plugins/dynamix/include/MarkdownInterface.php

@@ -0,0 +1,38 @@
+<?php
+/**
+ * Markdown  -  A text-to-HTML conversion tool for web writers
+ *
+ * @package   php-markdown
+ * @author    Michel Fortin <michel.fortin@michelf.com>
+ * @copyright 2004-2022 Michel Fortin <https://michelf.com/projects/php-markdown/>
+ * @copyright (Original Markdown) 2004-2006 John Gruber <https://daringfireball.net/projects/markdown/>
+ */
+
+namespace Michelf;
+
+/**
+ * Markdown Parser Interface
+ */
+interface MarkdownInterface {
+	/**
+	 * Initialize the parser and return the result of its transform method.
+	 * This will work fine for derived classes too.
+	 *
+	 * @api
+	 *
+	 * @param  string $text
+	 * @return string
+	 */
+	public static function defaultTransform(string $text): string;
+
+	/**
+	 * Main function. Performs some preprocessing on the input text
+	 * and pass it through the document gamut.
+	 *
+	 * @api
+	 *
+	 * @param  string $text
+	 * @return string
+	 */
+	public function transform(string $text): string;
+}

plugins/dynamix/include/PageBuilder.php

@@ -11,7 +11,7 @@
  */
 ?>
 <?
-require_once "$docroot/webGui/include/Markdown.php";
+require_once "$docroot/webGui/include/MarkdownExtra.inc.php";
 
 function get_ini_key($key,$default) {
   $x = strpos($key, '[');

plugins/dynamix/include/Translations.php

@@ -11,6 +11,8 @@
  */
 ?>
 <?
+require_once "$docroot/webGui/include/MarkdownExtra.inc.php";
+
 // start new session as required
 if (session_status()==PHP_SESSION_NONE && !isset($login_locale)) {
   session_start();
@@ -21,7 +23,6 @@ $session = '/var/lib/php/sess_'.session_id();
 if (file_exists($session)) {
   if (filesize($session)===0 || (count($_SESSION??[])==1 && isset($_SESSION['locale']))) unlink($session);
 }
-require_once "$docroot/webGui/include/Markdown.php";
 
 function _($text, $do=-1) {
   // PHP translation function _