Fixed #363. BIG UPDATE! WILL RESET YOUR FADMIN GROUPS!
You can now create groups based on admin/superadmin but without some of their privileges
You can add and remove privileges with the following commands:
FAdmin addprivilege <group> <privilege>
FAdmin removeprivilege <group> <privilege>

Example:
FAdmin addprivilege user Spectate
Allows the user to spectate