[css-values-4] <any-value> in functional <general-enclosed> should be a non-strict comma-containing production

[cdoublev]

About comma-containing productions:

If it does not start with a "{" token, then it cannot contain commas or {} blocks

@media unknown(foo, bar) {} and @media unknown({}) {} are valid today. So I think <any-value> in the functional <general-enclosed> should be defined as a non-strict comma-containing production.

I guess the above restriction should only apply in functions (which is unclear), so there is no need to define <any-value> in the <general-enclosed> block to allow @media (foo, bar) {} and @media ({}) to be parsed as valid rules, as well as :unknown-pseudo(foo, bar) and :unknown-pseudo({}) as <pseudo-class-selector>s.