Avoid using root for zfs sync across infrastructure

[alexgarel]

Ideally, for security reasons, root on a machine should not ssh as root on another machine.

This avoid for example, burning backups in case of a breach.

ZFS seems to support it through a feature called delegation (reference here)
and it seems usable with sanoid / syncoid (see end of article above, and this thread)

Test it and use it as much as possible.