kldunload(2) on FreeBSD

The text 1d5204a0ebe9, as FreeBSD 5.5-RELEASE, FreeBSD 5.4-RELEASE, FreeBSD 5.3-RELEASE, FreeBSD 5.2.1-RELEASE, FreeBSD 5.2-RELEASE, FreeBSD 5.1-RELEASE shipped it.

unload kld files

kldunload(2) on FreeBSD now