Deprecated the mhlib module for removal in 3.0.
diff --git a/Lib/mhlib.py b/Lib/mhlib.py
index 1a90375..856e878 100644
--- a/Lib/mhlib.py
+++ b/Lib/mhlib.py
@@ -52,6 +52,10 @@
 s = m.getbodytext()     # text of message's body, decoded
 s = m.getbodytext(0)    # text of message's body, not decoded
 """
+from warnings import warnpy3k
+warnpy3k("the mhlib module has been removed in Python 3.0; use the mailbox "
+            "module instead", stacklevel=2)
+del warnpy3k
 
 # XXX To do, functionality:
 # - annotate messages