diff mercurial/url.py @ 29455:0c741fd6158a

py3: conditionalize httplib import

The httplib library is renamed to http.client in python 3. So the
import is conditionalized and a test is added in check-code to warn
to use util.httplib

--- a/mercurial/url.py	Wed Jun 29 19:43:27 2016 -0700
+++ b/mercurial/url.py	Tue Jun 28 16:01:53 2016 +0530
@@ -10,7 +10,6 @@
 from __future__ import absolute_import
 
 import base64
-import httplib
 import os
 import socket
 
@@ -22,8 +21,9 @@
     sslutil,
     util,
 )
+
+httplib = util.httplib
 stringio = util.stringio
-
 urlerr = util.urlerr
 urlreq = util.urlreq