Comment 5 for bug 1658950

I'm here for nearly the same problem that I got when using musl C library and musl locales https://github.com/rilian-la-te/musl-locales which uses uppercase ".UTF-8" suffixes for the locale names. Despite my very special use case I'm shure we should be generally case independent on locale suffixes. Also, since I was up to propose a patch similar to the one given, I would like to see it applied as well.

Wether it was useful to filter out the "C" local should depend on the use case Piotr is going to point out.

Thanks for your work!