[ingo] sftp support for VFS driver

[Chuck Hagenbuch]

Quoting Cliff Green <green at umdnj.edu>:

> Interesting.  I went about it slightly differently, adding a $_drivers
> array and testing against that;  the patch for cvs  is different,
> obviously, but I can't vouch for how well it functions since I'm not
> currently using it.

I've tweaked the variable name in this version and committed it to  
HEAD - thanks!

-chuck

-- 
"we are plastered to the windshield of the bus that is time." - Chris