Mainly add support for podman build using --overlay mounts.
Updates containers/image also adds better support for new registries.conf
file.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
This should improve the speed of podman build.
Has fixes from containres/image for parallell pull.
Also vendor containers/storage and containers/image
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>