VOP_IOCTL(9) on FreeBSD

The text efb2439ed8b4, as FreeBSD 2.2.8-RELEASE, FreeBSD 2.2.7-RELEASE, FreeBSD 2.2.6-RELEASE, FreeBSD 2.2.5-RELEASE, FreeBSD 2.2.2-RELEASE shipped it.

device specific control

VOP_IOCTL(9) on FreeBSD now