- add exception for lulzbot-marlin-firmware (pbrobinson@gmail.com)
    - drop kexec arch conditional for aarch64 (pbrobinson@gmail.com)
    - imgutils: Don't relabel /ostree (walters@verbum.org)
    - Added option to remove packages (parallel to installpkgs) (riehecky@fnal.gov)
    - templates: When a subprocess fatally errors, output its stderr directly (walters@verbum.org)