auth: catalog zone producer docs do not mention SOA-EDIT should be NONE

[omoerbeek]

https://docs.powerdns.com/authoritative/catalog.html#setting-up-a-producer-zone
does not mention that the SOA-EDIT of the zone should be NONE (either by setting it explicitly or having that value in default-soa-edit. I observed SOAs using the YYYYMMDDNN pattern when setting up a catalog zone while having default-soa-edit set to INCEPTION-EPOCH, rendering the catalog hash mechanism ineffective.

Alternatively, producer zones should use the NONE setting by making the code do the right thing

[Habbie]

@mind04 do you have opinions on this?

[mind04]

I think documenting the interaction of SOA-EDIT with the automatic soa calculation is sufficient. I can imagine SOA-EDIT can be useful is setups with very few catalog zone updates to trigger periodic re-syncs.

[mutax]

I just ran into the same problem.

In my config I have set default-soa-edit=INCEPTION-INCREMENT, and was adding a catalog zone following the docs.
This seems to lead to the SOA value not being updated when adding/removing a zone to the catalog. After changing the SOA-EDIT value to NONE for the catalog zone the value in the AXFR finally was set to the EPOCH as required, but of course I now have to manually force-update the catalog zone on the secondaries to make things work.

I think it makes sense to add a word to the docs that the SOA-EDIT value needs to be set to NONE.