[REBOL] clean-path when arg is url?

[joel . neely]

Hmmm.  When the argument to clean-path is a url, the result seems to
be untouched.  This is born out by

    >> source clean-path
    clean-path: func [
        {Cleans-up '.' and '..' in path; returns the cleaned path.}
        target [file! url!]
        /local item file path mark mark2 marks dots dot dotdot
target-copy][
        if url? target [return target]

    ; and so on ... (snipped for space)

Why can't clean-path handle .. and . in url data?

-jn-