Coupon buff fix + concurrency fixes

Fixed coupon buff icon not showing properly. Fixed some cases involving
coupons and buff removal not dealing properly with concurrent access.

src/net/server/channel/handlers/PlayerLoggedinHandler.java

@@ -269,11 +269,10 @@ public final class PlayerLoggedinHandler extends AbstractMaplePacketHandler {
         
         if (player.getMap().getHPDec() > 0) player.resetHpDecreaseTask();
         
-        player.dispelBuffCoupons();
         player.resetPlayerRates();
         
         if(ServerConstants.USE_ADD_RATES_BY_LEVEL == true) player.setPlayerRates();
         player.setWorldRates();
-        player.setCouponRates();
+        player.updateCouponRates();
     }
 }