Merge master into '450-new-settings-rewrite'

Conflicts:
  - PerformBackup.java
  - Settings.java

src/test/java/fr/xephi/authme/util/UtilsTest.java

@@ -186,7 +186,6 @@ public class UtilsTest {
     }
 
     // Note: This method is used through reflections
-    @SuppressWarnings("unused")
     public static Player[] onlinePlayersImpl() {
         return new Player[]{
             mock(Player.class), mock(Player.class)