mostly support for newer kernel-versions, and fixes for the BRT bugs
discovered with 2.2.0 (BRT remains disabled by default).
The update contains a fix for CVE-2020-24370 in lua (which is present
in ZFS for channel-programs, which we do not use) - see:
https://github.com/openzfs/zfs/pull/15847 for more details.
One patch from Stefan Lendl was backported and is now in the ZFS 2.2
branch.
Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>