[Podman] name resolution between containers

Folks, There is a proof of concept available now that can allow name resolution between containers on the same network. The enablement is done by a CNI plugin and dnsmasq. I have added a tutorial on how to try this out in https://github.com/containers/dnsname/pull/7 . You need to be using the latest upstream Podman code as well until 1.6 is officially released.