Stop dig complaining about +noidn when it can't IDN
When dig is built without IDN support, it reports an error if the +noidnin and/or +noidnout options are used. This means the options are not useful for a script that wants consistent lack of IDN translation regardless of how BIND is built.
Now dig only complains if the user asks for IDN translation and support is not built in.
Closes #3188 (closed)