rpm-ostree: Fixes related to layering and container format support
rpm-ostree: Add support for container format
See https://github.com/ostreedev/ostree-rs-ext and https://coreos.github.io/rpm-ostree/container/
rpm-ostree: Fix release date when there are not layered changes
Look for the right timestamp entry when there are no layered packages.
rpm-ostree: Extract version from osrelease if empty
Directly extract the OS version from /etc/os-release if we can not find it in rpm-ostree metadata for the currently booted deployment.
Edited by Timothée Ravier