Comment 26 for bug 81844

I agree it's a bug that files with backslashes in the name can't be stored
and retrieved on Unix, and that they're probably not normalized in the
right way.

The other issue here is that when somebody is committing on Windows, we do
want to make sure any backslashes get converted to canonical path
separators, i.e. forward slashes. However really this should be treated as
a Windows-specific adaption rather than the core knowing anything about
backslashes.