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/reload-oxidized-nodes-list.inc.php

@@ -0,0 +1,28 @@
+<?php
+/*
+ * LibreNMS
+ *
+ * Copyright (c) 2018 Søren Friis Rosiak <sorenrosiak@gmail.com>
+ * 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;
+
+if (!LegacyAuth::user()->hasGlobalAdmin()) {
+    $status = 'error';
+    $message = 'ERROR: You need to be admin to reload Oxidized node list';
+} else {
+    oxidized_reload_nodes();
+    $status = 'ok';
+    $message = 'Oxidized node list was reloaded';
+}
+$output = array(
+    'status'  => $status,
+    'message' => $message,
+);
+header('Content-type: application/json');
+echo _json_encode($output);