AMK's megapatch:

* \bcode, \ecode added everywhere
	* \label{module-foo} added everywhere
	* A few \seealso sections added.
	* Indentation fixed inside verbatim in lib*tex files

Doc/lib/libzlib.tex

@@ -1,4 +1,5 @@
 \section{Built-in Module \sectcode{zlib}}
+\label{module-zlib}
 \bimodindex{zlib}
 
 For applications that require data compression, the functions in this
@@ -95,5 +96,8 @@ uncompressed output is returned.  After calling \code{flush()}, the
 action is to delete the object.
 \end{funcdesc}
 
+\begin{seealso}
+\seemodule{gzip}{reading and writing \file{gzip}-format files}
+\end{seealso}