Brings in a cherry pick of https://github.com/docker/libnetwork/commit/76bfcb0eb14686d3c25683df22e14bc1d3b093ef In sandbox creation we disable IPV6 config. But this causes problem in live-restore case where all IPV6 configs are wiped out on running container. Hence extra check has been added take care of this issue. Signed-off-by: Sebastiaan van Stijn <github@gone.nl>