patch up multiprocessing until it's API can be changed too
diff --git a/Lib/multiprocessing/managers.py b/Lib/multiprocessing/managers.py
index 160c1cc..6f0cc7d 100644
--- a/Lib/multiprocessing/managers.py
+++ b/Lib/multiprocessing/managers.py
@@ -154,7 +154,7 @@
                     except (OSError, IOError):
                         continue
                     t = threading.Thread(target=self.handle_request, args=(c,))
-                    t.set_daemon(True)
+                    t.daemon = True
                     t.start()
             except (KeyboardInterrupt, SystemExit):
                 pass