Added section headers for "Extending the Distutils" section (just

a reminder to myself).

Doc/dist/dist.tex

@@ -616,6 +616,20 @@ each, are:
 \subsection{Putting it all together}
 
 
+
+\section{Extending the Distutils}
+\label{sec:extending}
+
+
+\subsection{Extending existing commands}
+\label{sec:extend-existing}
+
+
+\subsection{Writing new commands}
+\label{sec:new-commands}
+
+
+
 \section{Reference}
 \label{sec:ref}