neil 4a3bc2c919 Fix dns_netcup reporting a bogus 4013 instead of the real zone error ...

The zone lookup walked the challenge name from the right and ended up
asking netcup for the full "_acme-challenge.<domain>" as a zone name.
That can never be a zone, so netcup answered 4013 "Validation Error",
which replaced the real 5028 "The zone <domain> could not be found" as
the error shown to the user.

Stop one label short of the full name, and fail explicitly when no zone
matched, reporting the last API response plus what to check. Before, a
run where every candidate returned 5028 fell through to logout and
returned success.

2026-08-10 10:00:26 +08:00

5.8 KiB

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