ports/103161: Add 'make version' to bsd.port.mk

[Lars Engels]

Quoting Kirill Ponomarew <krion at voodoo.bawue.com>:

> If submitter doesn't object, I'd like to close this PR.  We have:
>
> .if !target(package-name)
> package-name:
>     @${ECHO_CMD} ${PKGNAME}
> .endif
>
> which does exactly what submitter needs.
>
> -Kirill

Oh, sorry, I was not aware of that target.

What about the 'make maintainer' addition to ports(7)? Is it important  
enough to add it?