Networking: "docker run --net=container ..." does not work.

[jodh-intel]

Known limitation of code used to fix #38.

[mcastelino]

@jodh-intel @sameo In cc-oci-runtime we may not be able to support --net=container. The plan is to support the use case of --net=container which is Kubernetes/appc PODs at this point in time. Will update this issue with details on the POD implementation. Also add an issue to support Kubernetes/appc PODs.

[dlespiau]

Documented the current limitation. We definitely want to be able to support the POD concept, "joining" the VM network would mean executing the container inside an already existing VM. With the current direction we're heading for, it seems that we could implement --net=container.

[devimc]

this is a limitation that was documented https://github.com/01org/cc-oci-runtime/wiki/Limitations
Will be fixed in 3.0 - https://github.com/clearcontainers/runtime