Fix create name include url special characters

[mimuret]

["hoge/hoge","hoge#hoge","hoge?hoge"].each do |d|
  pp "input #{d}"
  pp "output #{Dnsruby::Name.create(d)}"
end
"input hoge/hoge"
"output hoge"
"input hoge#hoge"
"output hoge"
"input hoge?hoge"
"output hoge"

[keithrbennett]

@mimuret Thank you for this PR. I noticed that the gem you are using, simpleidn (https://github.com/mmriis/simpleidn) is not yet at version 1 and says it does not preserve case. @alexdalitz Is this a problem?

[alexdalitz]

Hi @mimuret -

Thanks for the patch!

I agree that your tests seem valid, and that the current IDN support in dnsruby seems to be failing here.

However, I'm a little concerned about the non-preservation of case. Although I accept that case does not matter in a pure DNS view, it is also the case that case preservation is a useful part of anti-spoofing defenses. In the ideal world, we would preserve the case that the client asked for.

Do you have any thoughts on this, please?

Thanks!

Alex.

[alexdalitz]

Ok, I guess this is a moot point, as Dnsruby downcases all labels anyway...

[mimuret]

RFC5890 describe,

A-labels should be produced only in lowercase

Already dnsruby can't save case-sensitive.

We choose case-sensitive or IDN support.

I like case-sensitive.