cas(4) on OpenBSD

The text 8c1c9f048b6e, as OpenBSD 5.3, OpenBSD 5.2, OpenBSD 5.1, OpenBSD 5.0, OpenBSD 4.9, OpenBSD 4.8, OpenBSD 4.7 shipped it.

Sun Cassini 10/100/Gigabit Ethernet device