Invalid IPv4 addresses are not rejected

[nox]

https://github.com/w3c/web-platform-tests/blob/11f3aee19205a2ae97efa1cbeb211a2395192ea8/url/urltestdata.txt#L325

[SimonSapin]

I believe this test does not match the current spec, but in this case I think the spec should be changed. Spec issue: https://www.w3.org/Bugs/Public/show_bug.cgi?id=26431

[frewsxcv]

Spec has been resolved

[nox]

This was closed, but we never added http://192.168.0.257 to the tests.