Merge remote-tracking branch 'upstream/master' into bpo-19675

# Conflicts:
#	Lib/test/_test_multiprocessing.py

Lib/test/_test_multiprocessing.py

@@ -4643,6 +4643,12 @@ def is_alive(self):
             any(process.is_alive() for process in forked_processes))
 
 
+
+class MiscTestCase(unittest.TestCase):
+    def test__all__(self):
+        # Just make sure names in blacklist are excluded
+        support.check__all__(self, multiprocessing, extra=multiprocessing.__all__,
+                             blacklist=['SUBDEBUG', 'SUBWARNING'])
 #
 # Mixins
 #