Update the link to Andrew Kuchling's crypto code.

Doc/lib/libcrypto.tex

@@ -13,7 +13,7 @@ written by Andrew Kuchling of further interest; the package adds
 built-in modules for DES and IDEA encryption, provides a Python module
 for reading and decrypting PGP files, and then some.  These modules
 are not distributed with Python but available separately.  See the URL
-\url{http://starship.python.net/crew/amk/python/crypto.html} or
+\url{http://starship.python.net/crew/amk/python/code/crypto.html} or
 send email to \email{amk1@bigfoot.com} for more information.
 \index{PGP}
 \index{Pretty Good Privacy}