Test if udp message boundry is preserved.

Test udp routing. Send packet from guest onto an IP assigned to local-scoped IP on host.

Test udp routing. There is a bug where two packets get merged into one if rapidly sent. This is breaking DNS.

Test inbound UDP SPP. Read more in https://developers.cloudflare.com/spectrum/getting-started/proxy-protocol/#enabling-simple-proxy-protocol-for-udp

Test udprcp local forwarding - bind to local port on host and forward it to the guest. udprpc is about rapidly closing udp rpc flows l

Basic test if -version prints version.