Add notes about the linuxaudiodev and ossaudiodev modules.

Doc/lib/libundoc.tex

@@ -61,12 +61,20 @@ OS/2 platforms.
 \item[\module{audiodev}]
 --- Platform-independent API for playing audio data.
 
+\item[\module{linuxaudiodev}]
+--- Play audio data on the Linux audio device.  Replaced in Python 2.3
+by the \module{ossaudiodev} module.
+
 \item[\module{sunaudio}]
 --- Interpret Sun audio headers (may become obsolete or a tool/demo).
 
 \item[\module{toaiff}]
 --- Convert "arbitrary" sound files to AIFF files; should probably
 become a tool or demo.  Requires the external program \program{sox}.
+
+\item[\module{ossaudiodev}]
+--- Play audio data via the Open Sound System API.  This is usable on
+Linux, some flavors of BSD, and some commercial \UNIX{} platforms.
 \end{description}