[feature request] including ZeroTier

[cpu]

Suggested by @strixaluco in StreisandEffect/streisand#390

Wanted to suggest ZeroTier, which is zero-configuration multiplatform software-based FOSS switch.
Technical FAQ

Clients:
ZeroTier One
Linux / macOS / Windows / Android / iOS

[laduke]

Here's how you would set up ZeroTier as the equivalent of a privacy VPN, if anyone ever ends up here

Overriding Default Route / Full Tunnel Mode
https://support.zerotier.com/knowledgebase.php?entry=show&search-for=&article=ZWFhNWMyMTZjODY1ODcwNmFhZmJjYmRhN2I5MjRhOGQ_

If you tried to do this on a Streisand instance, I bet you'd have some issues with the other tap/tun devices, routing, iptables... to work through.

The client is very simple to set up though and some people may already be using it for other things. I guess if you were out and about on your laptop or phone, you could have access to your home/office LAN and your tunnel from the same VPN connection.