Add comment to Distutil files about requiring 1.5.2 compatibility, as
    suggested by PEP 291.
diff --git a/Lib/distutils/log.py b/Lib/distutils/log.py
index 6aeb7c9..0442033 100644
--- a/Lib/distutils/log.py
+++ b/Lib/distutils/log.py
@@ -1,5 +1,7 @@
 """A simple log mechanism styled after PEP 282."""
 
+# This module should be kept compatible with Python 1.5.2.
+
 # The class here is styled after PEP 282 so that it could later be
 # replaced with a standard Python logging implementation.