Netclient: the client for Netmaker networks

I've made the PR for the netclient package for OpenWrt: and I wanted to start a dedicated thread for it.

You can also check the (currently bare-bones) README.

Besides creating a binary for all platforms, the netclient package also installs the init-script which starts/runs netclient.


Summary for people wondering what this is:

"Netmaker makes networks with WireGuard. Netmaker automates fast, secure, and distributed virtual networks."