Put --describe-config in the right place.

doc/src/sgml/ref/postgres-ref.sgml

 <!--
-$Header: /cvsroot/pgsql/doc/src/sgml/ref/postgres-ref.sgml,v 1.40 2003/10/28 19:39:18 momjian Exp $
+$Header: /cvsroot/pgsql/doc/src/sgml/ref/postgres-ref.sgml,v 1.41 2003/11/02 12:58:11 petere Exp $
 PostgreSQL documentation
 -->
 
@@ -27,6 +27,7 @@ PostgreSQL documentation
    <arg>-B <replaceable>nbuffers</replaceable></arg>
    <arg>-c <replaceable>name</replaceable>=<replaceable>value</replaceable></arg>
    <arg>-d <replaceable>debug-level</replaceable></arg>
+   <arg>--describe-config</arg>
    <arg>-D <replaceable>datadir</replaceable></arg>
    <arg>-e</arg>
    <arg>-E</arg>
@@ -66,7 +67,6 @@ PostgreSQL documentation
    <arg>-S <replaceable>sort-mem</replaceable></arg>
    <arg>-v <replaceable>protocol</replaceable></arg>
    <arg>-W <replaceable>seconds</replaceable></arg>
-   <arg>--describe-config</arg>
    <arg>--<replaceable>name</replaceable>=<replaceable>value</replaceable></arg>
   </cmdsynopsis>
  </refsynopsisdiv>