Disabled Gravatars

app/src/main/java/eu/faircode/email/ContactInfo.java

@@ -168,11 +168,11 @@ public class ContactInfo {
 
         if (info.bitmap == null) {
             boolean gravatars = prefs.getBoolean("gravatars", false);
-            if (gravatars) {
+            if (gravatars && BuildConfig.DEBUG) {
                 HttpURLConnection urlConnection = null;
                 try {
                     String hash = Helper.md5(address.getAddress().getBytes());
-                    URL url = new URL("https://www.gravatar.com/avatar/" + hash+"?d=404");
+                    URL url = new URL("https://www.gravatar.com/avatar/" + hash + "?d=404");
 
                     urlConnection = (HttpURLConnection) url.openConnection();
                     urlConnection.setRequestMethod("GET");

app/src/main/java/eu/faircode/email/FragmentOptionsDisplay.java

@@ -599,6 +599,7 @@ public class FragmentOptionsDisplay extends FragmentBase implements SharedPrefer
         swColorStripe.setChecked(prefs.getBoolean("color_stripe", true));
         swAvatars.setChecked(prefs.getBoolean("avatars", true));
         swGravatars.setChecked(prefs.getBoolean("gravatars", false));
+        swGravatars.setVisibility(BuildConfig.DEBUG ? View.VISIBLE : View.GONE);
         swGeneratedIcons.setChecked(prefs.getBoolean("generated_icons", true));
         swIdenticons.setChecked(prefs.getBoolean("identicons", false));
         swIdenticons.setEnabled(swGeneratedIcons.isChecked());