---
fixes:
  - |
    It was previously not possible to override the topics for various serivces (e.g. mdns),
    due to `bug 1832799`_. This has been fixed, and these services now use a common option name to
    override the topic.

    e.g.

    .. code-block:: ini

      [service:mdns]
      topic = mdns

    .. _bug 1832799: https://bugs.launchpad.net/designate/+bug/1832799
