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Aaron Guise
83fbb03cad
CoreDNS MySQL (cybercinch fork) expects '@' for zone-apex references in record RDATA. Storing the full FQDN (e.g. 'ithome.net.nz.') caused CoreDNS to strip the zone suffix and serve 'MX 0 .' / 'CNAME .' instead of the correct apex target. - Add _relativize_name(): converts zone FQDN → '@', in-zone subdomains → relative label, external FQDNs left unchanged. Handles both already- relativized output from dnspython ($ORIGIN present) and absolute FQDNs when $ORIGIN is absent from the zone file. - Replace _normalize_cname_data() with _relativize_name(); add _normalize_mx_data(), _normalize_ns_data(), _normalize_srv_data() using the same helper. - _parse_zone_to_record_set() now normalizes MX, NS, SRV alongside CNAME. - _ensure_zone_exists() sets managed_by='directadmin' on create and back-fills NULL rows from pre-migration installs. - Zone.managed_by changed to nullable=True to match ALTER TABLE migration where existing rows have no value. - schema/coredns_mysql.sql updated to reflect actual two-table schema with managed_by column and migration comment. - 11 new tests (130 total, all passing).