New port: simh-hpdoc (PR 244395)

[Bob Eager]

Hi!

I hate to bug people about this sort of thing, as I know there is
always a big queue.

I submitted this PR a few weeks ago. It's simply a documentation
package so shouldn't take long.

It's a dependency for two other ports that I am waiting to submit (see
the PR). I don't really want to submit them until this is safely
committed.

Can someone take a look, please?

 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=244395

Thanks