kvm_getargv(3) on FreeBSD

The text 65160833bbdd, 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.

access user process state

kvm_getargv(3) on FreeBSD now