SF #662923

Add support for the iterator and mapping protocols.
For Py2.3, this was done for shelve, dumbdbm and other mapping objects, but
not for bsddb and dbhash which were inadvertently missed.
diff --git a/Misc/NEWS b/Misc/NEWS
index 5cf8d72..6f9855c 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -35,6 +35,10 @@
 Library
 -------
 
+- The bsddb module and dbhash module now support the iterator and
+  mapping protocols which make them more substitutable for dictionaries
+  and shelves.
+
 - The csv module's DictReader and DictWriter classes now accept keyword
   arguments.  This was an omission in the initial implementation.