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/pages/health/mempool.inc.php

@@ -0,0 +1,60 @@
+<?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
+*/
+
+$pagetitle[] = "Health :: Memory";
+?>
+
+<div class="panel panel-default panel-condensed">
+    <div class="panel-heading">
+        <div class="row" style="padding:0px 10px 0px 10px;">
+            <div class="pull-left">
+                <?php echo $navbar; ?>
+            </div>
+
+            <div class="pull-right">
+                <?php echo $displayoptions; ?>
+            </div>
+        </div>
+    </div>
+    <div class="table-responsive">
+        <table id="mempool" class="table table-hover table-condensed mempool">
+            <thead>
+                <tr>
+                    <th data-column-id="hostname">Device</th>
+                    <th data-column-id="mempool_descr">Memory</th>
+                    <th data-column-id="graph" data-sortable="false" data-searchable="false"></th>
+                    <th data-column-id="mempool_used" data-searchable="false">Used</th>
+                    <th data-column-id="mempool_perc" data-searchable="false">Usage</th>
+                </tr>
+            </thead>
+        </table>
+    </div>
+</div>
+<script>
+    var grid = $("#mempool").bootgrid({
+        ajax: true,
+        rowCount: [50, 100, 250, -1],
+        post: function ()
+        {
+            return {
+                id: "mempool",
+                view: '<?php echo $vars['view']; ?>'
+            };
+        },
+        url: "ajax_table.php"
+    });
+</script>