Parse errors on namespace prefixes

[mthuurne]

Feed the following CSS fragment to the validator using the CSS level 3 profile:

@namespace xlink "http://www.w3.org/1999/xlink";
a[xlink|href] { color: red; }

It will report a parse error on [xlink|href]. However, as far as I know the syntax is correct.

I also tried using a namespace on an element name instead of on an attribute name, but that also leads to a parse error.

The @namespace rule is parsed without problems, so there is some kind of namespace support in the parser.

[dauwhe]

Just ran into this problem with CSS for EPUB, which has namespaced attributes.

[ylafon]

Fixed by the selectors parsing rewrite, see #339

[mthuurne]

A quick test confirms that this indeed solves the false positive I was encountering. Thanks!