cygwin

I can't be any more specific about versions and such, as I am still a
mere user :P, but 'rmdir --help' returns no -tag for
'--ignore-fail-on-non-empty'.
I don't know if there should be one, but it's not consistent with the
other listings (containing operator tags) and would not work with the
extended command (The long name I mentioned before).

Sincerely,
Chaz