Additional RRs for ILNP RR queries.
RFC 6742 has some requirements like this one:
To improve performance, ILNP-aware DNS servers and DNS resolvers MAY attempt to return all L32, L64, and LP records for the same owner name of the NID RRset in the Additional section of the response, if space permits.
(in fact one per new RR)
bind implements the ILNP MRs but not these "Additional Section Processing" requirements.
BTW if it is enough to put some code into additionaldata_xxx() functions in function in the corresponding lib/dns/rdata/generic/foo_yyy.c files I can provide the patch in a MR.