Consider ignoring UTS46 validity criteria V2

[valenting]

Each of the following criteria must be satisfied for a label:
2. The label must not contain a U+002D HYPHEN-MINUS character in both the third and fourth positions. 

However, it seems that other UAs don't enforce this, and it matches domains commonly used on youtube. ex: r6---sn-5hne6nee.googlevideo.com

[SimonSapin]

In that case, UTS-46 should probably be changed to match reality. It says:

Please submit corrigenda and other comments with the online reporting form [Feedback].

so please do that. But since Unicode doesn’t have a public bug tracker, it’d be good to also track it in whatwg/url#53.

[valenting]

Just to note, I raised the issue using the reporting form, and they took note of the offending URLs such as http://r6---sn-5hne6nee.googlevideo.com

The rule is only included because the IETF wanted to reserve labels of the form XX--... for future use, in case they wanted another signature like "xn--"

They will probably address this in the June release of the next version.

[Manishearth]

I think we should make accepting this behavior an option in ParseOptions.

@canaltinova want to try working on this? see #207 for more context

[canova]

Sure, I can give it a try :)

[SimonSapin]

I'm convinced it's worth an option. If nobody follows a spec on some detail, it's a spec bug and we should just align with other implementation.

[thomcc]

Did this ever get an option? Currently (I think?) hitting this in mozilla-mobile/fenix#2994

[SimonSapin]

I don’t remember any of the details, but this issue is marked as closed by #240.