Update ClientIdentificationPacket to include ISCPE flag

Author: Trollhunters501

src/main/java/com/github/steveice10/mc/classic/protocol/ClientListener.java

@@ -12,7 +12,7 @@
 public class ClientListener extends SessionAdapter {
     @Override
     public void connected(ConnectedEvent event) {
-        event.getSession().send(new ClientIdentificationPacket(event.getSession().<String>getFlag(ClassicConstants.USERNAME_KEY), event.getSession().<String>getFlag(ClassicConstants.VERIFICATION_KEY), 0));
+        event.getSession().send(new ClientIdentificationPacket(event.getSession().<String>getFlag(ClassicConstants.USERNAME_KEY), event.getSession().<String>getFlag(ClassicConstants.VERIFICATION_KEY), event.getSession().<Boolean>getFlag(ClassicConstants.ISCPE, false)));
     }
 
     @Override
@@ -21,4 +21,4 @@ public void packetReceived(PacketReceivedEvent event) {
             event.getSession().disconnect(event.<ServerDisconnectPacket>getPacket().getReason());
         }
     }
-}
+}