---
features:
  - |
    The diskimage-create script now supports generic download mirrors via the
    DIB_DISTRIBUTION_MIRROR environment variable, replacing the existing
    distribution-specific elements
upgrade:
  - |
    For the diskimage-create script, the BASE_OS_MIRROR environment variable
    was renamed to DIB_DISTRIBUTION_MIRROR
deprecations:
  - |
    These custom distribution mirror elements for the diskimage-script were
    removed: apt-mirror, centos-mirror, fedora-mirror
