OpenBSD missing from systems that 'work best' with relays

The URL: https://www.torproject.org/docs/tor-doc-relay.html.en#setup

states:

You can run a Tor relay on pretty much any operating system. Tor relays work best on current distributions of Linux, FreeBSD, NetBSD, and Windows Server.

OpenBSD is notably missing from the list even though it provides a way to run a tor relay. Is there a reason for this?

Trac:
Username: mulander