> I don't think that we should support non-ASCII encodings for meta-data 
> strings passed to setup().
> 
> If setuptools is broken in this respect, it needs to be fixed. Dito for
> other 3rd party tools.

We do need to support non-ASCII files, as distutils didn't previously
even support Unicode strings, and people still wanted to get their names
right. It's not about setuptools, and not about other 3rd party tools.
It's about distutils packages which we need to continue to support.