Add Vagrant based smoke tests (#1067)

* WIP smoke test freebsd

* fix bitrot

We now test that the firewall blocks inbound on host3 from host2

* WIP ipv6 test

* cleanup

* rename to make clear

* fix filename

* restore

* no sudo docker

* WIP

* WIP

* WIP

* WIP

* extra smoke tests

* WIP

* WIP

* add over improvements made in smoke.sh

* more tests

* use generic/freebsd14

* cleanup from test

* smoke test openbsd-amd64

* add netbsd-amd64

* try to fix vagrant

.github/workflows/smoke/genconfig.sh

@@ -47,7 +47,7 @@ listen:
   port: ${LISTEN_PORT:-4242}
 
 tun:
-  dev: ${TUN_DEV:-nebula1}
+  dev: ${TUN_DEV:-tun0}
 
 firewall:
   inbound_action: reject