Minor nit fixes based on suggestions from Ka-Ping Yee <ping@lfw.org>.

Added "See also" section with relevant RFC references.

Doc/lib/libxdrlib.tex

 \section{\module{xdrlib} ---
-         Encode and decode XDR data.}
-\declaremodule{standard}{xdrlib}
+         Encode and decode XDR data}
 
+\declaremodule{standard}{xdrlib}
 \modulesynopsis{Encoders and decoders for the External Data
-Representation (XDR).}
+                Representation (XDR).}
 
 \index{XDR}
 \index{External Data Representation}
 
-
 The \module{xdrlib} module supports the External Data Representation
 Standard as described in \rfc{1014}, written by Sun Microsystems,
 Inc. June 1987.  It supports most of the data types described in the
@@ -30,6 +29,17 @@ values from a string buffer.  The input buffer is given as
 \end{classdesc}
 
 
+\begin{seealso}
+  \seerfc{1014}{XDR: External Data Representation Standard}{This RFC
+                defined the encoding of data which was XDR at the time
+                this module was originally written.  It has
+                appearantly been obsoleted by \rfc{1832}.}
+
+  \seerfc{1832}{XDR: External Data Representation Standard}{Newer RFC
+                that provides a revised definition of XDR.}
+\end{seealso}
+
+
 \subsection{Packer Objects \label{xdr-packer-objects}}
 
 \class{Packer} instances have the following methods: