Remove dead link.

David Christensen

Discussion: http://postgr.es/m/82299377-1480-4439-9ABA-5828D71AA22E@endpoint.com

doc/src/sgml/high-availability.sgml

@@ -76,9 +76,7 @@
 
  <para>
   The remainder of this section outlines various failover, replication,
-  and load balancing solutions.  A <ulink
-  url="http://www.postgres-r.org/documentation/terms">glossary</ulink> is
-  also available.
+  and load balancing solutions.
  </para>
 
  <sect1 id="different-replication-solutions">