Corrections for controller subdirectories acceptance

In the file system/engine/action.php we can create subfolder under the 'controller' folder to have a hierarchy structure for controller but the permissions failed.
For example: admin/controller/restful/sale/order.php => /index.php?route=restful/sale/order.

I modified the permissions file (user_permission.php & permission.php) to take that into account (in the backend we can now check/uncheck the permissions)

Best regards

Helgvor STOLL