dnsdist: Inconsistent casing in `DNSAction.Nxdomain` and `DNSRCode.NXDOMAIN`

[rgacogne]

• Program: dnsdist
• Issue type: Bug report

Short description

It's impossible to get the correct version (Nxdomain, NXdomain, NXDomain, NXDOMAIN, ...) right without looking at the documentation, which is terrible. It would be nice to be consistent about it, and to warn when the wrong version is used if possible.

[omoerbeek]

You forgot my favorite: NxDomain! :-/

[Habbie]

If you want some Lua metatable magic to give smart warnings (could even do a case insensitive search in that case), let me know what behaviour you'd like.

[rgacogne]

If I'm reading https://github.com/PowerDNS/pdns/blob/master/pdns/lua-base4.cc#L247 right, the authoritative server and the recursor use the all caps version, so perhaps it would make sense to do that as well?

[rgacogne]

@Habbie If you have an example to point me in the right direction for a case insensitive search, that would be very much appreciated :)