Fix invalid nxdomain response (fixes #257)#264

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Yannik wants to merge 2 commits intojoohoi:masterfrom Yannik:fix-invalid-nxdomain-response

Commits on Jun 9, 2021

Return NODATA instead of NXDOMAIN if we have RR of other type for domain
Yannik
committed

Commits on Jul 16, 2021

SOA belongs in authority section in case of NODATA response
Yannik
committed