Toggle the NX coupon loot notice

Added a toggle to the showHint that announces the NX gain on a NX coupon loot

src/main/java/config/ServerConfig.java

@@ -122,6 +122,7 @@ public class ServerConfig {
     //Announcement Configuration
     public boolean USE_ANNOUNCE_SHOPITEMSOLD;
     public boolean USE_ANNOUNCE_CHANGEJOB;
+    public boolean USE_NX_COUPON_LOOT_NOTICE;
 
     //Cash Shop Configuration
     public boolean USE_JOINT_CASHSHOP_INVENTORY;