Provide catalog zones to allow efficient provisioning of seconary servers

Registered by Christian Rohmann

Support for providing `catalog zones` should be added to Designate.

In essence "catalog zones" provide easy provisioning capabilities for the list of zones
on secondary servers via AXFR from a special zone, the "catalog".

The below links explain the catalog zone feature, use cases and data model:
* https://zones.cat/
* https://kb.isc.org/docs/aa-01401
* https://datatracker.ietf.org/doc/draft-toorop-dnsop-dns-catalog-zones/

Blueprint information

Status:
Not started
Approver:
None
Priority:
Undefined
Drafter:
Christian Rohmann
Direction:
Needs approval
Assignee:
None
Definition:
New
Series goal:
None
Implementation:
Unknown
Milestone target:
None

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