zfs: load keys for encrypted datasets during pool import #3048

Job	Run time
Documentation	5m 50s
System (stable, cluster, dir)	12m 36s
System (stable, cluster, btrfs)	13m 46s
Code (oldstable)	7m 27s
Client (oldstable, ubuntu-latest)	1m 13s
System (stable, cluster, lvm)	13m 25s
Code (stable)	8m 0s
Client (oldstable, macos-latest)	1m 12s
Code (tip)	10m 50s
System (stable, cluster, zfs)	13m 47s
Client (oldstable, windows-latest)	2m 48s
System (stable, cluster, ceph)	17m 31s
Client (stable, ubuntu-latest)	1m 4s
System (stable, cluster, random)	13m 14s
Client (stable, macos-latest)	1m 10s
System (stable, standalone, dir)	24m 7s
Client (stable, windows-latest)	1m 58s
System (stable, standalone, btrfs)	23m 50s
System (stable, standalone, lvm)	41m 25s
System (stable, standalone, zfs)	37m 22s
System (stable, standalone, ceph)	1h 15m 30s
System (stable, standalone, random)	24m 17s
System (oldstable, cluster, dir)	12m 54s
System (oldstable, standalone, dir)	22m 30s
System (tip, cluster, dir)	16m 18s
System (tip, standalone, dir)	27m 13s
	7h 11m 17s

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