move i2p2.de to the 'mirrors' column in the footer.

 - the real domain is now geti2p.net
 - the configured cert for i2p2.de is for geti2p.net

Since we have the certificates for i2p2.de we should use them, but since
i2p2.de redirects to geti2p.net anyway, should it really be listed as a
mirror? In any case, it doesn't belong in the "secure" column.

i2p2www/pages/global/footer.html

@@ -3,13 +3,13 @@
         <ul>
           <li><a rel="nofollow" href="http://i2pproject.net/">http://i2pproject.net</a></li>
           <li><a rel="nofollow" href="http://i2p-projekt.de/">http://i2p-projekt.de</a></li>
+          <li><a rel="nofollow" href="http://www.i2p2.de/">https://www.i2p2.de</a></li>
         </ul>
       </div>
       <div class='aside second'>
         <h1>{{ _('Secure') }}</h1>
         <ul>
           <li><a rel="nofollow" href="https://geti2p.net/">https://geti2p.net</a></li>
-          <li><a rel="nofollow" href="https://www.i2p2.de/">https://www.i2p2.de</a></li>
           <li><a rel="nofollow" href="https://geti2p.com/">http://geti2p.com</a></li>
         </ul>
       </div>