bpf(4) on OpenBSD

The text 8cf72ca95da6, as OpenBSD 5.4, OpenBSD 5.3, OpenBSD 5.2, OpenBSD 5.1, OpenBSD 5.0, OpenBSD 4.9, OpenBSD 4.8 shipped it.

Berkeley Packet Filter

bpf(4) on OpenBSD now