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/device/canopy_generic_freq.inc.php

@@ -0,0 +1,18 @@
+<?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.
+ */
+require 'includes/html/graphs/common.inc.php';
+$rrdfilename = rrd_name($device['hostname'], 'canopy-generic-freq');
+if (rrdtool_check_rrd_exists($rrdfilename)) {
+    $rrd_options .= " COMMENT:'Ghz           Now     \\n'";
+    $rrd_options .= ' DEF:freq='.$rrdfilename.':freq:AVERAGE ';
+    $rrd_options .= " LINE2:freq#FF0000:'Frequency       ' ";
+    $rrd_options .= ' GPRINT:freq:LAST:%0.2lf%s\\\l ';
+}