It seems the parts implemented in Go were deliberately left out from the package. I can think of a few good reasons though not for shipping a
manpage that deals with a missing facility, and on my installation this
is one out of a tiny number where most of the others are somehow
justified. I consider this the actual omission, please remove it, or at
least explain the situation as was requested already a year ago. The
possible reply to this report isn't accessible to me. Again consider
NEWS or changelog for explanations, it's what they're supposed to be for
and those are transparent to users without the need for decryption.