/etc/zfs/zed.d/zed-functions.sh is in zfs-zed 0.6.5.6-0ubuntu8.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/zfs-linux/zfs/zed.d/zed-functions.sh
/usr/lib/zfs-linux/zfs/zed.d/zed-functions.sh