This new flag will allow the configuration of an interface that
can be used for data path traffic to be isolated from control
plane traffic. This flag is simply percolated down to libnetwork
and will be used by all the global scope drivers (today overlay)
Negative test added for invalid flag arguments
Signed-off-by: Flavio Crisciani <flavio.crisciani@docker.com>
swarmkit's API type. Make sure this parameter gets propagated to
swarmkit, and also add an extra option to the CLI when providing
external CAs to parse the CA cert from a file.
Signed-off-by: Ying Li <ying.li@docker.com>