restructured library manual accordiung to functional group
diff --git a/Doc/libcrypto.tex b/Doc/libcrypto.tex
index 972106c..cc38e5b 100644
--- a/Doc/libcrypto.tex
+++ b/Doc/libcrypto.tex
@@ -1,9 +1,22 @@
-\chapter{CRYPTOGRAPHIC EXTENSIONS}
+\chapter{Cryptographic Services}
+\index{cryptography}
The modules described in this chapter implement various algorithms of
a cryptographic nature. They are available at the discretion of the
-installation.
-\index{cryptography}
+installation. Here's an overview:
+
+\begin{description}
+
+\item[md5]
+--- RSA's MD5 message digest algorithm.
+
+\item[mpz]
+--- Interface to the GNU MP library for arbitrary precision arithmetic.
+
+\item[rotor]
+--- Enigma-like encryption and decryption.
+
+\end{description}
Hardcore cypherpunks will probably find the Python Cryptography Kit of
further interest; the package adds built-in modules for DES and IDEA