_Py_PrintReferenceAddresses():  also print the type name.  In real use
I'm finding some pretty baffling output, like reprs consisting entirely
of three left parens.  At least this will let us know what type the object
is (it's not str -- there's no quote character in the repr).

New tool combinerefs.py, to combine the two output blocks produced via
PYTHONDUMPREFS.
diff --git a/Misc/NEWS b/Misc/NEWS
index 7a40c52..3a19a20 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -162,6 +162,9 @@
 Tools/Demos
 -----------
 
+- New script combinerefs.py helps analyze new PYTHONDUMPREFS output.
+  See the module docstring for details.
+
 TBD
 
 Build