If networking is disabled, but then pipework is used later to add nics, the network still doesn't function. Using flags=up for empty networking fixes this. Docker-DCO-1.1-Signed-off-by: James DeFelice <james.defelice@ishisystems.com> (github: jdef) Upstream-commit: 17c124baf6a0f3725615b22aa52ca96ac5b95326 Component: engine