Patch: file: -> file:/// in w32

[Lennart Borgman]

I believe a file url in w32 should begin with "file:///" not just 
"file:". (I am unsure about ms-dos here.) A tiny patch is attached for this.
Index: lisp/net/browse-url.el
===================================================================
RCS file: /cvsroot/emacs/emacs/lisp/net/browse-url.el,v
retrieving revision 1.53
diff -c -r1.53 browse-url.el
*** lisp/net/browse-url.el      6 Feb 2006 11:33:04 -0000       1.53
--- lisp/net/browse-url.el      16 Feb 2006 23:38:42 -0000
***************
*** 458,464 ****
      ;; applies.
      ("^/\\([^:@address@hidden)?\\([^:]+\\):/*" . "ftp://\\1\\2/";)
      (,@ (if (memq system-type '(windows-nt ms-dos cygwin))
!           '(("^\\([a-zA-Z]:\\)[\\/]" . "file:\\1/")
                ("^[\\/][\\/]+" . "file://"))))
      ("^/+" . "file:/")))
    "*An alist of (REGEXP . STRING) pairs used by `browse-url-of-file'.
--- 458,464 ----
      ;; applies.
      ("^/\\([^:@address@hidden)?\\([^:]+\\):/*" . "ftp://\\1\\2/";)
      (,@ (if (memq system-type '(windows-nt ms-dos cygwin))
!           '(("^\\([a-zA-Z]:\\)[\\/]" . "file:///\\1/")
                ("^[\\/][\\/]+" . "file://"))))
      ("^/+" . "file:/")))
    "*An alist of (REGEXP . STRING) pairs used by `browse-url-of-file'.