Script references patch

Cleared issue in a few scripts which would be trying to access Java Math library methods with unexpected parameter types.
Fixed EllinPQ rewarder NPC handing out an unexpected itemid to the player.
Cleared SQL foreign key constraint statement no longer supposed to be used.

src/config/ServerConfig.java

@@ -58,6 +58,7 @@ public class ServerConfig {
     public boolean USE_DEBUG_SHOW_PACKET;
     public boolean USE_SUPPLY_RATE_COUPONS;
     public boolean USE_IP_VALIDATION;
+    public boolean USE_CHARACTER_ACCOUNT_CHECK;
 
     public boolean USE_MAXRANGE;
     public boolean USE_MAXRANGE_ECHO_OF_HERO;