Revert "Discard unsupported messages instead of disconnecting the peer."

This reverts commit d086ade91f.

src/main/java/org/qortal/network/Peer.java

@@ -12,7 +12,6 @@ import org.qortal.data.network.PeerData;
 import org.qortal.network.message.ChallengeMessage;
 import org.qortal.network.message.Message;
 import org.qortal.network.message.MessageException;
-import org.qortal.network.message.UnsupportedMessageException;
 import org.qortal.network.task.MessageTask;
 import org.qortal.network.task.PingTask;
 import org.qortal.settings.Settings;
@@ -511,13 +510,8 @@ public class Peer {
                     ByteBuffer readOnlyBuffer = this.byteBuffer.asReadOnlyBuffer().flip();
                     try {
                         message = Message.fromByteBuffer(readOnlyBuffer);
-                    } catch (UnsupportedMessageException e) {
-                        // Unsupported message - discard it without disconnecting
-                        LOGGER.debug("[{}] {}, from peer {} - discarding...", this.peerConnectionId, e.getMessage(), this);
-                        return;
                     } catch (MessageException e) {
-                        // Any other message exception - disconnect the peer
-                        LOGGER.debug("[{}] {}, from peer {} - forcing disconnection...", this.peerConnectionId, e.getMessage(), this);
+                        LOGGER.debug("[{}] {}, from peer {}", this.peerConnectionId, e.getMessage(), this);
                         this.disconnect(e.getMessage());
                         return;
                     }

src/main/java/org/qortal/network/message/Message.java

@@ -104,7 +104,7 @@ public abstract class Message {
 			MessageType messageType = MessageType.valueOf(typeValue);
 			if (messageType == null)
 				// Unrecognised message type
-				throw new UnsupportedMessageException(String.format("Received unknown message type [%d]", typeValue));
+				throw new MessageException(String.format("Received unknown message type [%d]", typeValue));
 
 			// Optional message ID
 			byte hasId = readOnlyBuffer.get();

src/main/java/org/qortal/network/message/UnsupportedMessageException.java

@@ -1,19 +0,0 @@
-package org.qortal.network.message;
-
-@SuppressWarnings("serial")
-public class UnsupportedMessageException extends MessageException {
-    public UnsupportedMessageException() {
-    }
-
-    public UnsupportedMessageException(String message) {
-        super(message);
-    }
-
-    public UnsupportedMessageException(String message, Throwable cause) {
-        super(message, cause);
-    }
-
-    public UnsupportedMessageException(Throwable cause) {
-        super(cause);
-    }
-}