Fix the test_urllib2net failures that were caused by r58067.

I'm not sure this is the correct fix, but at least the test passes
now and should be closer to correct.

Lib/urllib2.py

@@ -1246,7 +1246,7 @@ class FTPHandler(BaseHandler):
         import mimetypes
         host = req.get_host()
         if not host:
-            raise URLError, ('ftp error', 'no host given')
+            raise URLError('ftp error: no host given')
         host, port = splitport(host)
         if port is None:
             port = ftplib.FTP_PORT
@@ -1292,7 +1292,7 @@ class FTPHandler(BaseHandler):
             headers = mimetools.Message(sf)
             return addinfourl(fp, headers, req.get_full_url())
         except ftplib.all_errors, msg:
-            raise URLError, ('ftp error', msg), sys.exc_info()[2]
+            raise URLError, ('ftp error: %s' % msg), sys.exc_info()[2]
 
     def connect_ftp(self, user, passwd, host, port, dirs, timeout):
         fw = ftpwrapper(user, passwd, host, port, dirs, timeout)