Security fix: unauthorized access (#10091)

* Security fix: unauthorized access
Affects nginx users:
Moved php files outside of public html directory (Apache was protected by .htaccess)

Affects all users:
Some files did not check for authentication and could disclose some info.
Better checks before including files from user input

* git mv html/includes/ includes/html
git mv html/pages/ includes/html/

includes/html/forms/delete-alert-transport.inc.php

@@ -0,0 +1,44 @@
+<?php
+
+/*
+ * LibreNMS
+ *
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.  Please see LICENSE.txt at the top level of
+ * the source code distribution for details.
+ */
+
+use LibreNMS\Authentication\LegacyAuth;
+
+header('Content-type: application/json');
+
+if (!LegacyAuth::user()->hasGlobalAdmin()) {
+    die(json_encode([
+        'status' => 'error',
+        'message' => 'You need to be admin.'
+    ]));
+}
+
+$status = 'ok';
+$message = '';
+
+if (!is_numeric($vars['transport_id'])) {
+    $status = 'error';
+    $message = 'No transport selected';
+} else {
+    if (dbDelete('alert_transports', '`transport_id` = ?', [$vars['transport_id']])) {
+        dbDelete('alert_transport_map', '`target_type` = "single" AND `transport_or_group_id` = ?', [$vars['transport_id']]);
+        dbDelete('transport_group_transport', '`transport_id`=?', [$vars['transport_id']]);
+
+        $message = 'Alert transport has been deleted';
+    } else {
+        $message = 'Alert transport has not been deleted';
+    }
+}
+
+die(json_encode([
+    'status' => $status,
+    'message'=> $message
+]));