ALIAS/ANAME support

[drmuey]

We understand ALIAS/ANAME are not standard RFC record types, however they are widely used and supported (e.g. powerdns).

Is there a way to allow ldns to understand them? e.g. building with --enable-rrtype-alias-aname would be great, that way its opt in and folks not using it won’t have it.

They are fairly simple:

example.com. 14400 IN ALIAS fqdn.example.org
example.com. 14400 IN ANAME fqdn.example.org

[drmuey]

i.e. --enable-rrtype-alias-aname akin to #177’s --enable-rrtype-svcb-https for SVCB and HTTPS record support.