Index: book.xml
===================================================================
--- book.xml	(révision 39719)
+++ book.xml	(copie de travail)
@@ -4546,6 +4546,42 @@
 	      Do not use this method for new ports.</para>
 	  </important>
 	</sect3>
+	<sect3>
+	  <title>Default options</title>
+	  <table frame="none">
+	    <title>List of options always on by default</title>
+	    <tgroup colS="2">
+	      <thead>
+	        <row>
+	          <entry>Option</entry>
+	          <entry>Description</entry>
+	        </row>
+	      </thead>
+	      <tbody>
+	        <row>
+	          <entry>DOCS</entry>
+	          <entry>Build and/or install documentation</entry>
+	        </row>
+	        <row>
+	          <entry>NLS</entry>
+	          <entry>Native Language Support</entry>
+	        </row>
+	        <row>
+	          <entry>EXAMPLES</entry>
+	          <entry>Build and/or install examples</entry>
+	        </row>
+	        <row>
+	          <entry>IPV6</entry>
+	          <entry>IPv6 protocol support</entry>
+	        </row>
+	      </tbody>
+	    </tgroup>
+	  </table>
+	  <note>
+	    <para>For the above option, no need to add them to
+	      <makevar>OPTIONS_DEFAULT</makevar></para>
+	  </note>
+	</sect3>
       </sect2>
 
       <sect2>