* Move services graph code from device to service and remove unused code
* Add proper support for services to dashboard graph weidget
* Fix phpdoc in ServiceController still pointing to MuninPluginController
Ensures check_ds variable is always null on each run of loop that displays services graphs. Fixes services that have script (like check_dns) but don't set check_dns on their own inheriting check_dns from previous service that ran (for example check_icmp) and displaying additional bogus graphs as result.
* 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/
