Ports that were defined in app manifest can be
exposed via --port=name:host-port option on cmd line.
For example, given app manifest with ports entry:
{
"name": "http",
"port": 80,
"protocol": "tcp"
}
rkt run --private-net --port=http:8888 myapp.aci
will forward traffic from host's tcp port 8888 to
container's port 80.
Fixes#624
macvlan uses the specified host's interface to send the
packets. However macvlan will have its own MAC address
(randomly generated by the kernel) making it look like
yet another interface on the link.
Fixes#478
Rob Szumski