[XML-SIG] file urls in urllib

[Mark D. Anderson]

> > file://C:/autoexec.bat
> 
> This mapping skips a slash for the hostname. I'm using a commercial tool, XML 
> Authority, that is written in Java.  It maps the local file:
> C:/windows/command.com
> to:
> file:///C:/windows/command.com
> This looks consistent with the example mapping of a VMS logical drive in RFC 
> 1738:
>...

exactly. if file:///C:/autoexec.bat is correct then file:////etc/passwd should be, regardless
of current practice. as i mentioned, this is clarified in the direction of the slash being
a syntactic separator only in the nfs url rfc2224.

however, i do realize current practice is for the 3-slash version for unix-style paths.

-mda