Docs: Add netstats article and tech/networks directory.

Change-Id: Id4631fdaeb0a5bba7ca4e1b69fa19416214b0580
diff --git a/src/devices/devices_toc.cs b/src/devices/devices_toc.cs
index 35ef3b4..08f7569 100644
--- a/src/devices/devices_toc.cs
+++ b/src/devices/devices_toc.cs
@@ -250,6 +250,8 @@
         </ul>
       </li>
 
+      <li><a href="<?cs var:toroot ?>devices/tech/netstats.html">Viewing Network Data</a></li>
+
       <li>
           <a href="<?cs var:toroot ?>devices/tech/power.html">
             <span class="en">Power</span>