Updating HTMLPurifier to 4.9.3

Source: https://htmlpurifier.org/download
Release date: 2017-06-19

extlib/HTMLPurifier/HTMLPurifier/HTMLModule/TargetNoopener.php

@@ -0,0 +1,21 @@
+<?php
+
+/**
+ * Module adds the target-based noopener attribute transformation to a tags.  It
+ * is enabled by HTML.TargetNoopener
+ */
+class HTMLPurifier_HTMLModule_TargetNoopener extends HTMLPurifier_HTMLModule
+{
+    /**
+     * @type string
+     */
+    public $name = 'TargetNoopener';
+
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config) {
+        $a = $this->addBlankElement('a');
+        $a->attr_transform_post[] = new HTMLPurifier_AttrTransform_TargetNoopener();
+    }
+}

extlib/HTMLPurifier/HTMLPurifier/HTMLModule/TargetNoreferrer.php

@@ -0,0 +1,21 @@
+<?php
+
+/**
+ * Module adds the target-based noreferrer attribute transformation to a tags.  It
+ * is enabled by HTML.TargetNoreferrer
+ */
+class HTMLPurifier_HTMLModule_TargetNoreferrer extends HTMLPurifier_HTMLModule
+{
+    /**
+     * @type string
+     */
+    public $name = 'TargetNoreferrer';
+
+    /**
+     * @param HTMLPurifier_Config $config
+     */
+    public function setup($config) {
+        $a = $this->addBlankElement('a');
+        $a->attr_transform_post[] = new HTMLPurifier_AttrTransform_TargetNoreferrer();
+    }
+}