Before this change, chunker would erroneously consider two different paths to be
equal if, due to special characters, they normalized to equal-folding strings in
Standard Encoding, but not otherwise. This caused base objects to get moved when
they should not have been. This change fixes the issue, which was discovered on
the bisync integration tests.
Ideally it should also be fixed when the base Fs is non-local, but there's not an
easy way at the moment to reference the wrapped Fs's encoding, at least without
breaking encapsulation.
fe6c9aa4da