Add back information about 'autoselect' with network cards.

Requested by:	blackend (3 months ago!)

en_US.ISO8859-1/books/handbook/config/chapter.sgml

@@ -1056,6 +1056,13 @@ round-trip min/avg/max/stddev = 0.700/0.729/0.766/0.025 ms</screen>
 	traffic, even ping requests!  Read on to <xref
 	linkend="firewalls"> for more information.</para>
 
+      <para>Sometimes performance of the card is poor, or below average.
+	In these cases it is best to set the media selection mode
+	to <literal>autoselect</literal>.  While this usually works
+	for most hardware, it may not resolve this issue for everyone.
+	Again, check all the network settings, and read over the
+	&man.tuning.7; manual page.</para>
+
       </sect3>
     </sect2>
   </sect1>