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/common/syslog.inc.php

@@ -0,0 +1,51 @@
+<?php
+/*
+ * 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
+*/
+
+$common_output[] = '
+<div class="table-responsive">
+    <table id="syslog" class="table table-hover table-condensed table-striped">
+        <thead>
+            <tr>
+                <th data-column-id="label"></th>
+                <th data-column-id="timestamp" data-order="desc">Timestamp</th>
+                <th data-column-id="level">Level</th>
+                <th data-column-id="device_id">Hostname</th>
+                <th data-column-id="program">Program</th>
+                <th data-column-id="msg">Message</th>
+                <th data-column-id="priority">Priority</th>
+            </tr>
+        </thead>
+    </table>
+</div>
+<script>
+
+var syslog_grid = $("#syslog").bootgrid({
+    ajax: true,
+    rowCount: [50, 100, 250, -1],
+    post: function ()
+    {
+        return {
+            device: "' . addcslashes($vars['device'], '"') . '",
+            program: "' . addcslashes($vars['program'], '"') . '",
+            priority: "' . addcslashes($vars['priority'], '"') . '",
+            to: "' . addcslashes($vars['to'], '"') . '",
+            from: "' . addcslashes($vars['from'], '"') . '",
+        };
+    },
+    url: "ajax/table/syslog"
+});
+
+</script>
+';