[racket-dev] Can get-pure-port's signature be expanded to consume strings too?

I keep finding myself writing:

    (get-pure-port (string->url ...))

where the call to get-pure-port always has a string->url there.  I was
wondering if something like the following patch would be acceptable:

    https://github.com/dyoo/racket/commit/3aa1467a168be758c20e36ee7afad190f3af0ad0