优化附件列表图片生成

优化referrer默认值

application/admin/controller/general/Attachment.php

@@ -65,7 +65,7 @@ class Attachment extends Backend
                 ->order($sort, $order)
                 ->paginate($limit);
 
-            $cdnurl = preg_replace("/\/(\w+)\.php$/i", '', $this->request->root());
+            $cdnurl = preg_replace("/\/(\w+)\.php$/i", '', $this->request->root(true));
             foreach ($list as $k => &$v) {
                 $v['fullurl'] = ($v['storage'] == 'local' ? $cdnurl : $this->view->config['upload']['cdnurl']) . $v['url'];
             }

application/admin/view/common/meta.html

@@ -2,7 +2,7 @@
 <title>{$title|default=''}</title>
 <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
 <meta name="renderer" content="webkit">
-<meta name="referrer" content="never">
+<meta name="referrer" content="no-referrer">
 <meta name="robots" content="noindex, nofollow">
 
 <link rel="shortcut icon" href="__CDN__/assets/img/favicon.ico" />