* Pull in the changes to the automatic scrub cronjob from
debian-upstream [0] commit
f6d45405df0a2ed2748975667e8ea50714034d13
* Add a script and cronjob for regular trimming of pools
* Change the logic to scrub/trim pools based on a per pool('s root
dataset property)
pulled the changes in as one commit instead of cherry-picking, since
the planned and reverted debconf questions would have caused
unneccessary churn.
commits identified by running:
`git log --full-diff -- debian/tree/zfsutils-linux/usr/lib/zfs-linux`
in a worktree from [0].
[0] https://salsa.debian.org/zfsonlinux-team/zfs/
Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>