There are cases such as migrating from classic overlay network to the swarm-mode networking (without kv-store), such a mechanism to allow disconnecting a container even when a network isnt available will be useful. Signed-off-by: Madhu Venugopal <madhu@docker.com> Upstream-commit: 05a3f2666ee34c2dfa04663bbdda3c7763b001d8 Component: engine