Disconnect client by throwing exception in handler

This makes it easier to add checks in handlers, which should improve security over time.
I think this approach is more readable and testable than calling Client#disconnect straight up,
while it also decentralizes the handling.

src/main/java/net/server/channel/handlers/GeneralChatHandler.java

@@ -26,6 +26,7 @@ import client.Client;
 import client.autoban.AutobanFactory;
 import client.command.CommandsExecutor;
 import net.AbstractPacketHandler;
+import net.netty.GameViolationException;
 import net.packet.InPacket;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -51,8 +52,7 @@ public final class GeneralChatHandler extends AbstractPacketHandler {
         if (s.length() > Byte.MAX_VALUE && !chr.isGM()) {
             AutobanFactory.PACKET_EDIT.alert(c.getPlayer(), c.getPlayer().getName() + " tried to packet edit in General Chat.");
             log.warn("Chr {} tried to send text with length of {}", c.getPlayer().getName(), s.length());
-            c.disconnect(true, false);
-            return;
+            throw GameViolationException.textLength(s);
         }
         char heading = s.charAt(0);
         if (CommandsExecutor.isCommand(c, s)) {