[dns-operations] service.gov.scot erroneous NXDOMAIN from "scot" auth servers

[Viktor Dukhovni]

The gov.scot zone is unsigned, with "service.gov.scot" as a subdomain,
but "DS" queries for "service.gov.scot" incorrectly elicit NXDOMAIN,
rather than NODATA responses from the "scot" auth servers.

    $ dig -t ds service.gov.scot @anycast9.irondns.net +norecur +nocmd +noall +nostats +comment +noedns
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 22729
    ;; flags: qr aa; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

-- 
    Viktor.