sdtemp(4) on OpenBSD

The text e59c39bfe64f, as OpenBSD 5.6, OpenBSD 5.5, OpenBSD 5.4, OpenBSD 5.3, OpenBSD 5.2, OpenBSD 5.1 shipped it.

SO-DIMM (JC-42.4) temperature sensor

sdtemp(4) on OpenBSD now