go-module(5) on OpenBSD

The text c061b9f10275, as OpenBSD 7.6, OpenBSD 7.5, OpenBSD 7.4, OpenBSD 7.3, OpenBSD 7.2, OpenBSD 7.1, OpenBSD 7.0 shipped it.

lang/go port module

go-module(5) on OpenBSD now