Bug fixes

Correct settings name

* DEL : LICENSE (drupal.org)
* UPT : Drupal coding Standard
* Remove site_* var in flavor of http_handler_site_*
* Remove drupal_* functions in flavor of http_handler_drupal_*

- #2982553 by david.chevillet, harings_rob and Peter Majmesku: Permissions are saved, even if no permissions have been selected
- #2986711 by benjaminbradley: roles with 'bypass node access' permission always assigned when terms saved

Fixed code styles
Fixed Issue #2977204 by AndoMeneshyan

Refactored code in order to comply with Drupal code standards.