Use \manpage{} markup for referencing a UNIX man page.
Added index entry for DES cipher.
diff --git a/Doc/lib/libcrypt.tex b/Doc/lib/libcrypt.tex
index 64a9bfc..777f87e 100644
--- a/Doc/lib/libcrypt.tex
+++ b/Doc/lib/libcrypt.tex
@@ -2,7 +2,7 @@
\label{module-crypt}
\bimodindex{crypt}
-This module implements an interface to the crypt(\strong{3}) routine,
+This module implements an interface to the \manpage{crypt}{3} routine,
which is a one-way hash function based upon a modified DES algorithm;
see the \UNIX{} man page for further details. Possible uses include
allowing Python scripts to accept typed passwords from the user, or
@@ -13,10 +13,10 @@
\begin{funcdesc}{crypt}{word\, salt}
\var{word} will usually be a user's password. \var{salt} is a
2-character string which will be used to select one of 4096 variations
-of DES. The characters in \var{salt} must be either \code{.},
-\code{/}, or an alphanumeric character. Returns the hashed password
-as a string, which will be composed of characters from the same
-alphabet as the salt.
+of DES\indexii{cipher}{DES}. The characters in \var{salt} must be
+either \code{.}, \code{/}, or an alphanumeric character. Returns the
+hashed password as a string, which will be composed of characters from
+the same alphabet as the salt.
\end{funcdesc}
The module and documentation were written by Steve Majewski.