[new] net/zerotier-one

Hello,

I'm new here. OpenBSD is one of many platforms that I support, and a
customer needs ZeroTier on OpenBSD, so I've taken a shot at packaging it
under the name net/zerotier-one. You can find it on GitHub for now. (I
know that OpenBSD uses CVS, but I haven't made time to learn that yet.)

https://github.com/troyjfarrell/zerotier-one-openbsd-ports

Notes:
- The current version of ZeroTier-One is not (yet) FOSS, but uses the
Business Source License, so it will become FOSS in a few years.
- I plan to add an rc.d script soon.
- I don't know whether this daemon needs its own user or not. How do I
decide that? I'm leaning toward yes, because it puts a secret API
token in /var/db/zerotier-one/authtoken.secret, which should probably
be accessible by the daemon.

Feedback is welcome. Thanks!

Troy