OS-BS replacement

[Arnold Shade]

Thank you Bill, I will follow your recommendations. However as far as I
can understand there is no port for os-bs at all, I just wanted to
update /tools directory as a first step, not the ports tree.

> I've copied ports at freebsd.org, but I doubt there's any need to discuss
> this at length.
> I recommend doing the following:
> 1) Read the FreeBSD Porters Handbook:
>    http://www.freebsd.org/doc/en_US.ISO8859-1/books/porters-handbook/
> 2) Create a port for your program.
> 3) Submit a PR based on the guidelines in #1, be sure to note in the
>    PR that this port supersedes the old os-bs port, so the committer
>    can do the right thing.