---
upgrade:
  - |
    Remove deprecated ``backup`` commands.
    Use ``volume backup`` commands instead.
  - |
    Remove deprecated ``snapshot`` commands.
    Use ``volume snapshot`` commands instead.
  - |
    Remove deprecated ``volume create`` options ``--project``, ``--user``
    and ``--multi-attach``.
  - |
    Change ``volume transfer request accept`` to use new required option
    ``--auth-key`` rather than a second positional argument.