Fix VACUUM sgml markup.

doc/src/sgml/ref/vacuum.sgml

 <!--
-$PostgreSQL: pgsql/doc/src/sgml/ref/vacuum.sgml,v 1.37 2005/07/30 15:45:49 momjian Exp $
+$PostgreSQL: pgsql/doc/src/sgml/ref/vacuum.sgml,v 1.38 2005/07/30 17:03:56 momjian Exp $
 PostgreSQL documentation
 -->
 
@@ -180,7 +180,7 @@ VACUUM [ FULL | FREEZE ] [ VERBOSE ] ANALYZE [ <replaceable class="PARAMETER">ta
     increase in I/O traffic, which cause poor performance for other active
     sessions.  Therefore, it is sometimes advisable to use
     the cost-based vacuum delay feature.  See <xref
-    linkend="runtime" endterm="runtime-config-resource-vacuum-cost"> for more
+    linkend="runtime-config-resource-vacuum-cost"> for more
     details.
    </para>
  </refsect1>
@@ -238,7 +238,7 @@ VACUUM
 
   <simplelist type="inline">
    <member><xref linkend="app-vacuumdb" endterm="app-vacuumdb-title"></member>
-   <member><xref linkend="runtime" endterm="runtime-config-resource-vacuum-cost"></member>
+   <member><xref linkend="runtime-config-resource-vacuum-cost"></member>
   </simplelist>
  </refsect1>
 </refentry>