Phobos function to check if files are identical?

[XavierAP via Digitalmars-d-learn]

On Tuesday, 14 March 2017 at 08:12:16 UTC, Andrea Fontana wrote:
>
> First I would check if the files have different size or if they 
> are the same file (same path, symlink, etc).

Good idea. Good reason to have it in std.file. There might also 
be platform dependent shortcuts?