TS-4716: OpenBSD mandir should be ${prefix}/man

[jablko]

Fixes #1353

[atsci]

FreeBSD build successful! See https://ci.trafficserver.apache.org/job/Github-FreeBSD/1362/ for details.

[atsci]

Linux build successful! See https://ci.trafficserver.apache.org/job/Github-Linux/1255/ for details.

[zwoop]

I'm marking this for 7.1.0, since it's mostly benign, and generally useful.

[zwoop]

+1

[zwoop]

Question: Why is this PR also modifying the Debian layout? That seems slightly non-intuitive considering the Summary from the PR (OpenBSD).

Update: I think I see, it's merely a cleanup (no change in actual path). Still +1.

[jablko]

I'm marking this for 7.1.0, since it's mostly benign, and generally useful.

Sounds good, thanks! Merged.

Update: I think I see, it's merely a cleanup (no change in actual path). Still +1.

Yes, exactly. I noticed it while I was editing config.layout, so I put it in the same PR, but it has nothing to do with OpenBSD, so I made it a separate commit. What I should've done was also mention it in the PR description, and point out that it's just a cleanup. Next time!