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/print-event-short.inc.php

@@ -0,0 +1,33 @@
+<?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.
+ *
+ * @package    LibreNMS
+ * @subpackage webui
+ * @link       http://librenms.org
+ * @copyright  2017 LibreNMS
+ * @author     LibreNMS Contributors
+*/
+
+unset($icon);
+$severity_colour = eventlog_severity($entry['severity']);
+$icon = '<span class="alert-status ' . $severity_colour . '"></span>';
+
+echo '<tr>';
+echo '<td>' . $icon . '</td>';
+echo '<td>' . $entry['humandate'] . '</td>';
+
+if ($entry['type'] == 'interface') {
+    $entry['link'] = '<b>' . generate_port_link(cleanPort(getifbyid($entry['reference']))) . '</b>';
+}
+
+echo '<td>'.$entry['link'].'</td>';
+echo '<td>' . htmlspecialchars($entry['message']) . '</td>';
+
+echo '</tr>';