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/graphs/global/poller_perf.inc.php

@@ -0,0 +1,50 @@
+<?php
+/**
+ * poller_perf.php
+ *
+ * -Description-
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @package    LibreNMS
+ * @link       http://librenms.org
+ * @copyright  2018 Tony Murray
+ * @author     Tony Murray <murraytony@gmail.com>
+ */
+
+use App\Models\Device;
+
+$scale_min = '0';
+
+require 'includes/html/graphs/common.inc.php';
+
+$cdef = [];
+$suffix = '';
+
+foreach (Device::pluck('hostname') as $index => $hostname) {
+    $rrd_filename = rrd_name($hostname, 'poller-perf');
+    if (rrdtool_check_rrd_exists($rrd_filename)) {
+        $rrd_options .= " DEF:pollerRaw$index=$rrd_filename:poller:AVERAGE";
+        // change undefined to 0
+        $rrd_options .= " CDEF:poller$index=pollerRaw$index,UN,0,pollerRaw$index,IF";
+        $cdef[] = 'poller' . $index . $suffix;
+        $suffix = ',+';
+    }
+}
+
+$rrd_options .= " CDEF:poller=" . implode(',', $cdef);
+$rrd_options .= " 'COMMENT:Seconds      Cur     Min     Max     Avg\\n'";
+$rrd_options .= ' LINE1.25:poller#36393D:Poller';
+$rrd_options .= ' GPRINT:poller:LAST:%6.2lf  GPRINT:poller:MIN:%6.2lf';
+$rrd_options .= " GPRINT:poller:MAX:%6.2lf  'GPRINT:poller:AVERAGE:%6.2lf\\n'";