Have cfmfile raise a DeprecationWarning as per PEP 4.
diff --git a/Lib/plat-mac/cfmfile.py b/Lib/plat-mac/cfmfile.py
index fd1a3e8..91ab0a6 100644
--- a/Lib/plat-mac/cfmfile.py
+++ b/Lib/plat-mac/cfmfile.py
@@ -11,6 +11,9 @@
 import os
 import sys
 
+import warnings
+warnings.warn("the cfmfile module is deprecated", DeprecationWarning, 2)
+
 DEBUG = 0
 
 error = "cfm.error"