* Add 'net rpc group add'.
* Implement 'net groupmap set' and 'net groupmap cleanup'.
* Add 'net rpc group [add|del]mem' for domain groups and aliases.
* Add 'net rpc group add'.
* Implement 'net groupmap set' and 'net groupmap cleanup'.
* Add 'net rpc group [add|del]mem' for domain groups and aliases.