Add google search widget to rclone.org

docs/layouts/_default/baseof.html

@@ -57,5 +57,6 @@
     <script src="/js/popper.min.1.16.0.js"></script>
     <script src="/js/bootstrap.min.4.4.1.js"></script>
     <script src="/js/custom.js?r={{ .Date.Unix }}"></script>
+    <script src="/js/search.js?r={{ .Date.Unix }}"></script>
   </body>
 </html>

docs/layouts/chrome/navbar.html

@@ -113,5 +113,10 @@
         <a class="nav-link" href="/donate/"><i class="fa fa-heart heart"></i> Donate</a>
       </li>
     </ul>
+    <form class="form-inline" name="search_form" action="https://google.com/search" target="_blank" onsubmit="on_search();">
+      <input name="words" value="" type="search" placeholder="search..." class="form-control form-control-sm">
+      <input name="q" value="" type="hidden">
+      <input name="as_sitesearch" value="https://rclone.org/" type="hidden">
+    </form>
   </div>
 </nav>

docs/static/js/search.js

@@ -0,0 +1,4 @@
+function on_search() {
+  document.search_form.q.value = document.search_form.words.value + " -site:forum.rclone.org";
+  return true;
+}