working on list administration

src/main/java/de/srsoftware/widerhall/Util.java

@@ -83,4 +83,11 @@ public class Util {
         }
         return false;
     }
+
+    public static int unset(int value, int...flags) {
+        for (int flag : flags){
+            if ((value & flag) > 0) value ^= flag;
+        }
+        return value;
+    }
 }