cac(4) on OpenBSD

The text e2c5faef99d2, as OpenBSD 5.2, OpenBSD 5.1, OpenBSD 5.0, OpenBSD 4.9, OpenBSD 4.8, OpenBSD 4.7, OpenBSD 4.6, OpenBSD 4.5 shipped it.

Compaq Smart ARRAY 2/3/4 SCSI RAID controller