Adjusted to use the new module synopsis support macros.
diff --git a/Doc/lib/libzlib.tex b/Doc/lib/libzlib.tex
index 3838c86..718a3d4 100644
--- a/Doc/lib/libzlib.tex
+++ b/Doc/lib/libzlib.tex
@@ -2,8 +2,10 @@
% hasn't been updated yet
\section{Built-in Module \module{zlib}}
-\label{module-zlib}
-\bimodindex{zlib}
+\declaremodule{builtin}{zlib}
+
+\modulesynopsis{None}
+
For applications that require data compression, the functions in this
module allow compression and decompression, using the zlib library.