DEVICE_SHUTDOWN(9) on FreeBSD

The text 07f52b9deb56, as FreeBSD 5.3-RELEASE, FreeBSD 5.2.1-RELEASE, FreeBSD 5.2-RELEASE, FreeBSD 5.1-RELEASE, FreeBSD 5.0-RELEASE shipped it.

called during system shutdown

DEVICE_SHUTDOWN(9) on FreeBSD now