Notable upstream pull request merges:
#11710 Allow zfs to send replication streams with missing snapshots
#11751 Avoid taking global lock to destroy zfsdev state
#11786 Ratelimit deadman zevents as with delay zevents
#11803 ZFS traverse_visitbp optimization to limit prefetch
#11813 Allow pool names that look like Solaris disk names
#11822 Atomically check and set dropped zevent count
#11822 Don't scale zfs_zevent_len_max by CPU count
#11833 Refactor zfsdev state init/destroy to share common code
#11837 zfs get -p only outputs 3 columns if "clones" property is empty
#11843 libzutil: zfs_isnumber(): return false if input empty
#11849 Use dsl_scan_setup_check() to setup a scrub
#11861 Improvements to the 'compatibility' property
#11862 cmd/zfs receive: allow dry-run (-n) to check property args
#11864 receive: don't fail inheriting (-x) properties on wrong dataset type
#11877 Combine zio caches if possible
#11881 FreeBSD: use vnlru_free_vfsops if available
#11883 FreeBSD: add support for lockless symlink lookup
#11884 FreeBSD: add missing seqc write begin/end around zfs_acl_chown_setattr
#11896 Fix crash in zio_done error reporting
#11905 zfs-send(8): Restore sorting of flags
#11926 FreeBSD: damage control racing .. lookups in face of mkdir/rmdir
#11930 vdev_mirror: don't scrub/resilver devices that can't be read
#11938 Fix AVX512BW Fletcher code on AVX512-but-not-BW machines
#11955 zfs get: don't lookup mount options when using "-s local"
#11956 libzfs: add keylocation=https://, backed by fetch(3) or libcurl
#11959 vdev_id: variable not getting expanded under map_slot()
#11966 Scale worker threads and taskqs with number of CPUs
#11994 Clean up use of zfs_log_create in zfs_dir
#11997 FreeBSD: Don't force xattr mount option
#11997 FreeBSD: Implement xattr=sa
#11997 FreeBSD: Use SET_ERROR to trace xattr name errors
#11998 Simplify/fix dnode_move() for dn_zfetch
#12003 FreeBSD: Initialize/destroy zp->z_lock
#12010 Fix dRAID self-healing short columns
#12033 Revert "Fix raw sends on encrypted datasets when copying back snapshots"
#12040 Reinstate the old zpool read label logic as a fallback
#12046 Improve scrub maxinflight_bytes math
#12049 FreeBSD: avoid memory allocation in arc_prune_async
#12052 FreeBSD: incorporate changes to the VFS_QUOTACTL(9) KPI
#12061 Fix dRAID sequential resilver silent damage handling
#12072 Let zfs diff be more permissive
#12077 FreeBSD: Retry OCF ENOMEM errors.
#12088 Propagate vdev state due to invalid label corruption
#12091 libzfs: On FreeBSD, use MNT_NOWAIT with getfsstat
#12097 FreeBSD: Update dataset_kstats for zvols in dev mode
#12104 FreeBSD boot code reminder after zpool upgrade
#12114 Introduce write-mostly sums
Obtained from: OpenZFS
OpenZFS commit: 75b4cbf625
1603881667