This backports various fixes and also implements the partial /dev/zfs
stable API that I have developed at ClusterHQ over the past 14 months.
Ordinarily, I would not commit something like this until it has gone
upstream, but upstream wants review from people in the Illumos project
that prefer to see things like this in production before it reaches them
and it would have likely been deadlocked until I volunteered Gentoo.
I am confident that this is ready for production and I believe Gentoo
benefits from it enough to justify being the first production user.
Unless the API changes under review, situations where the kernel modules
and userland bits fall out of sync will no longer break the boot process
(excluding zfs-share and zfs-zed). This was the longstanding blocker to
the ebuilds moving from ~arch to arch, so we could finally see that
happen around later this month / early next month.
Signed-off-by: Richard Yao <email@example.com>