add a note about the undocumented bsddb185 module
diff --git a/Doc/lib/libbsddb.tex b/Doc/lib/libbsddb.tex
index e66b2bb..29cecec 100644
--- a/Doc/lib/libbsddb.tex
+++ b/Doc/lib/libbsddb.tex
@@ -86,6 +86,12 @@
\seemodule{dbhash}{DBM-style interface to the \module{bsddb}}
\end{seealso}
+\begin{notice}
+Beginning in 2.3 some Unix versions of Python may have a \module{bsddb185}
+module. This is present \emph{only} to allow backwards compatibility with
+systems which ship with the old Berkeley DB 1.85 database library. The
+\module{bsddb185} module should never be used directly in new code.
+\end{notice}
\subsection{Hash, BTree and Record Objects \label{bsddb-objects}}