give the threading API PEP 8 names
diff --git a/Lib/multiprocessing/reduction.py b/Lib/multiprocessing/reduction.py
index aa77075..0d6cf4f 100644
--- a/Lib/multiprocessing/reduction.py
+++ b/Lib/multiprocessing/reduction.py
@@ -84,7 +84,7 @@
                 debug('starting listener and thread for sending handles')

                 _listener = Listener(authkey=current_process().get_authkey())

                 t = threading.Thread(target=_serve)

-                t.setDaemon(True)

+                t.set_daemon(True)

                 t.start()

         finally:

             _lock.release()