htdocs: add Google Analytics support.

Use IP Anonymization.

htdocs/analyticstracking.php

@@ -0,0 +1,12 @@
+<script type="text/javascript">
+  var _gaq = _gaq || [];
+  _gaq.push(['_setAccount', 'UA-42882943-1']);
+  _gaq.push(['_gat._anonymizeIp']);
+  _gaq.push(['_trackPageview']);
+
+  (function() {
+    var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
+    ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
+    var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
+  })();
+</script>

htdocs/archive/index.php

@@ -55,5 +55,6 @@ uninitialized variables, unused functions" />
     <p><a href="/cgi-bin/archive.zip">Download all</a></p>
   </div> <!-- .wrap -->
 </div> <!-- #content -->
+<?php include_once("../analyticstracking.php") ?>
 </body>
 </html>

htdocs/demo/index.php

@@ -89,5 +89,6 @@ void f()
 <span class="br0">}</span></pre>
   </div> <!-- .wrap -->
 </div> <!-- #content -->
+<?php include_once("../analyticstracking.php") ?>
 </body>
 </html>

htdocs/demo/report/index.php

@@ -169,5 +169,6 @@
 ?>
   </div> <!-- .wrap -->
 </div> <!-- #content -->
+<?php include_once("../../analyticstracking.php") ?>
 </body>
 </html>

htdocs/devinfo/index.php

@@ -109,5 +109,6 @@ the latest sources in a zip or tgz archive</a> from the github website.</p>
 </ul>
   </div> <!-- .wrap -->
 </div> <!-- #content -->
+<?php include_once("../analyticstracking.php") ?>
 </body>
 </html>

htdocs/index.php

@@ -155,5 +155,6 @@ which is oriented for this environment. A comparison of Cppcheck and PVS-Studio
 </dl>
   </div> <!-- .wrap -->
 </div> <!-- #content -->
+<?php include_once("analyticstracking.php") ?>
 </body>
 </html>