Wildcard as glue record
Wildcard as glue record is handled differently compared to normal wildcard.
Query for a.ns.abc.example.com
on these zones:
abc NS a.ns.abc
0.ns.abc A 0.0.0.0
*.ns.abc A 1.2.3.4
No additional section, wildcard is not matched.
abc NS a.ns.abc
0.ns.abc A 0.0.0.0
*.abc A 1.2.3.4
Additional section contains a.ns.abc.example.com. IN A 1.2.3.4
, even if there exist other ns.abc record.