Use gravatar when enabled.

index.html

         </div>
         <div id="settingsmenu" class="right-panel">
             <div class="icon-settings" data-i18n="settings.title"></div>
-            <img id="avatar" src="https://www.gravatar.com/avatar/87291c37c25be69a072a4514931b1749?d=wavatar&size=30"/>
+            <img id="avatar" src="images/avatar2.png"/>
             <div class="arrow-up"></div>
             <input type="text" id="setDisplayName" data-i18n="[placeholder]settings.name" placeholder="Name">
             <input type="text" id="setEmail" placeholder="E-Mail">

modules/UI/avatar/Avatar.js

-/* global MD5 */
+/* global Strophe, APP, MD5, config */
+var Settings = require("../../settings/Settings");
+
 var users = {};
 
 var Avatar = {
             );
             email = id;
         }
-        return 'https://www.gravatar.com/avatar/' +
-            MD5.hexdigest(email.trim().toLowerCase()) +
-            "?d=wavatar&size=" + (size || "30");
+        if (config.enableThirdPartyRequests === true) {
+            return 'https://www.gravatar.com/avatar/' +
+                MD5.hexdigest(id.trim().toLowerCase()) +
+                "?d=wavatar&size=" + (size || "30");
+        } else {
+            return 'images/avatar2.png';
+        }
     }
 
 };
 
 
-module.exports = Avatar;
+module.exports = Avatar;