There's physlock[0] as well, as vlock (apparently) has some limitations according to physlock(1):

       physlock  is  an alternative to vlock, it is equivalent to `vlock -an'.
       It is written because vlock blocks some linux  kernel  mechanisms  like
       hibernate  and suspend and can therefore only be used with some limita‐
       tions.

I can't attest to this as I've only used vlock, so correct me if I'm wrong.

[0] http://github.com/muennich/physlock

There's libbsd for Linux, although I can't comment on the quality of its implementation.

libbsd and gnulib are pretty much just functions copy-pasted out of their original locations into conveniently organized repositories. There's not much to speak of concerning implementation quality.

Perhaps try #openbsd on Freenode.

definitely not. mail to bugs@openbsd.org

That is a little confusing to have on end point for openbsd, openssh and Montreal.

And Montreal...

Sorry that was a phone auto-correction. I typed in LibreSSL...

It's optional, off by default, and is anonymized (apparently).