change a few uses of the threading APIs
diff --git a/Lib/multiprocessing/queues.py b/Lib/multiprocessing/queues.py
index 7235a41..bfb5f09 100644
--- a/Lib/multiprocessing/queues.py
+++ b/Lib/multiprocessing/queues.py
@@ -155,7 +155,7 @@
                   self._wlock, self._writer.close),
             name='QueueFeederThread'
             )
-        self._thread.set_daemon(True)
+        self._thread.daemon = True
 
         debug('doing self._thread.start()')
         self._thread.start()