In order to handle special configuration for different drivers we make the Config field a map to string array. This lets us use it for lxc, by using the "lxc" key for those, and we can later extend it easily for other backend-specific options. Docker-DCO-1.1-Signed-off-by: Alexander Larsson <alexl@redhat.com> (github: alexlarsson) Upstream-commit: 7a3070a6000963d12be9dcd2698d911b848a33b6 Component: engine