yp(8) on OpenBSD

The text e0c9ead0838d, as OpenBSD 7.2, OpenBSD 7.1, OpenBSD 7.0, OpenBSD 6.9, OpenBSD 6.8, OpenBSD 6.7, OpenBSD 6.6 shipped it.

description of the YP subsystem

yp(8) on OpenBSD now