This replaces the NetworkJail string field with a struct pointer named
NetNS. This does not try to emulate the complete NetNS interface but does
help to re-use code that just refers to c.state.NetNS.
[NO NEW TESTS NEEDED]
Signed-off-by: Doug Rabson <dfr@rabson.org>
For FreeBSD, we need the name of the 'network jail' which is the parent
of all containers in a pod. Having a separate jail for the network
configuration also simplifies the implementation of CNI plugins so we
use this pattern for solitary containers as well as pods.
[NO NEW TESTS NEEDED]
Signed-off-by: Doug Rabson <dfr@rabson.org>
