Get rid of dict.has_key(). Boy this has a lot of repercussions!
Not all code has been fixed yet; this is just a checkpoint...
The C API still has PyDict_HasKey() and _HasKeyString(); not sure
if I want to change those just yet.
diff --git a/Lib/test/test_time.py b/Lib/test/test_time.py
index f4be759..4fd7834 100644
--- a/Lib/test/test_time.py
+++ b/Lib/test/test_time.py
@@ -180,7 +180,7 @@
             # rely on it.
             if org_TZ is not None:
                 environ['TZ'] = org_TZ
-            elif environ.has_key('TZ'):
+            elif 'TZ' in environ:
                 del environ['TZ']
             time.tzset()