Quick setup of ZFS encrytped datasets with sane permissions

Assuming you have a pool called tank...

And assuming you have an encrypted dataset (See Jim Saltar's short intro)

1. Create a group for permissions - in my case I have one called home
2. Then if there's anything in /tank/encrypted his it with chgrp -R home /tank/encrypted to give the home group ownership
3. Next we need to make sure that the members of home can do the writing... so chmod 775 -R /tank/encrypted will do the trick
4. Finally we want to make sure that all data created inside our dataset has the same set of permissions with chmod g+s /tank/encrypted and chmod g+w /tank/encrypted