add py3k warnings to  rfc822
diff --git a/Lib/test/test_rfc822.py b/Lib/test/test_rfc822.py
index 197887d..afbc984 100644
--- a/Lib/test/test_rfc822.py
+++ b/Lib/test/test_rfc822.py
@@ -1,7 +1,8 @@
-import rfc822
 import unittest
 from test import test_support
 
+rfc822 = test_support.import_module("rfc822", deprecated=True)
+
 try:
     from cStringIO import StringIO
 except ImportError: