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/table/wireless-sensors.inc.php

@@ -0,0 +1,6 @@
+<?php
+
+$table = 'wireless_sensors';
+$tab = 'wireless';
+
+include 'sensors-common.php';