Merge commit '8ae8b2a1445bcccee1bb8ee7d4886f30050f6f53' into merge2

sysinit.target depends on systemd-random-seed.service, so we need to
remove the systemd-random-seed.service dependency from
zfs-mount.service, otherwise it would undo our change related to
local-fs.target done in openzfs#51 (note that all services that do not have
DefaultDependencies=no depend on sysinit.target).

Therefore we discard the upstream change.