[RFA/libiberty] Darwin has case-insensitive filesystems

[Joel Brobecker]

> There's a difference between case preserving and case sensitive,
> though, and we really don't have a portable way to detect
> case-sensitivity on a per-directory basis, sow how can we do better?

That's roughly my thoughts on this issue. It's true that this property
is not an OS property, and we could try devising some ways to test it
in various ways.  But I think that the current solution is good enough
for practical purposes. A better solution is, in my opinion, more
effort than it is worth.

-- 
Joel