Make the __FreeBSD_version list its own section so it is easier to find

from the index.

Approved by:	trhodes

en_US.ISO8859-1/books/porters-handbook/book.sgml

@@ -2548,6 +2548,15 @@ PLIST_SUB=      OCTAVE_VERSION=${OCTAVE_VERSION}</programlisting>
 #    endif
 #endif</programlisting>
 
+        <para>In the hundreds of ports that have been done, there have only
+          been one or two cases where <literal>__FreeBSD__</literal> should
+          have been used.  Just because an earlier port screwed up and used it
+          in the wrong place does not mean you should do so too.</para>
+      </sect1>
+
+      <sect1 id="freebsd-versions">
+        <title>__FreeBSD_version values</title>
+
 		<informaltable frame="none">
 		<tgroup cols="2">
 		<thead>
@@ -3255,11 +3264,6 @@ PLIST_SUB=      OCTAVE_VERSION=${OCTAVE_VERSION}</programlisting>
             worry about old -CURRENTs; they are listed here just for your
             reference.</para>
         </note>
-
-        <para>In the hundreds of ports that have been done, there have only
-          been one or two cases where <literal>__FreeBSD__</literal> should
-          have been used.  Just because an earlier port screwed up and used it
-          in the wrong place does not mean you should do so too.</para>
       </sect1>
 
       <sect1>
@@ -3322,7 +3326,7 @@ PLIST_SUB=      OCTAVE_VERSION=${OCTAVE_VERSION}</programlisting>
                 <entry><makevar>OSVERSION</makevar></entry>
                 <entry>The numeric version of the operating system, same as
                   <link
-                    linkend="porting-versions"><literal>__FreeBSD_version</literal></link>.</entry>
+                    linkend="freebsd-versions"><literal>__FreeBSD_version</literal></link>.</entry>
               </row>
 
               <row>