reopen jfbterm related PRs

[Anonymous]

Anonymous <swell.k at gmail.com> writes:

> I think following PRs were closed by mistake
>
>   ports/139107 (bsdmake)
>   ports/146230 (png14)
>   ports/146271 (PREFIX)
>
> The issues they're trying to solve are still present after miwi@'s
> commit on 5 Jun.

Got a reply from miwi@ but that was more than a week ago. Whatever he's
up to I think those PRs shouldn't have `closed' state *until* they're are
solved. I don't see how sweeping them under the carpet is helpful.