doc: Remove dead link

The link to the NIST web page about DES standards leads to nowhere, and
according to archive.org has been forwarded to an unrelated page for
many years.  Therefore, just remove that link.  More up to date
information can be found via Wikipedia, for example.

diff --git a/doc/src/sgml/pgcrypto.sgml b/doc/src/sgml/pgcrypto.sgml
index a1797f8681f93312c17ef9a20ab310b533000f1c..544a1f8346a44227adaa6130009b09ef1a281ee9 100644 (file)
--- a/doc/src/sgml/pgcrypto.sgml
+++ b/doc/src/sgml/pgcrypto.sgml
@@ -1299,10 +1299,6 @@ gen_random_uuid() returns uuid
      </para>
      <para>Comparison of crypt-des, crypt-md5 and bcrypt algorithms.</para>
     </listitem>
-    <listitem>
-     <para><ulink url="http://csrc.nist.gov/cryptval/des.htm"></ulink></para>
-     <para>Standards for DES, 3DES and AES.</para>
-    </listitem>
     <listitem>
      <para>
       <ulink url="http://en.wikipedia.org/wiki/Fortuna_(PRNG)"></ulink>