Interpret three slashes in file: URL as local file (for Netscape on

Windows/Mac).

Lib/urllib.py

@@ -281,7 +281,7 @@ class URLopener:
 
 	# Use local file or FTP depending on form of URL
 	def open_file(self, url):
-		if url[:2] == '//':
+	    if url[:2] == '//' and url[2:3] != '/':
 		return self.open_ftp(url)
 	    else:
 		return self.open_local_file(url)