Suppress some really annoying spam

proxy/src/main/java/com/velocitypowered/proxy/connection/MinecraftConnection.java

@@ -205,19 +205,32 @@ public class MinecraftConnection extends ChannelInboundHandlerAdapter {
    */
   public void closeWith(Object msg) {
     if (channel.isActive()) {
+      if (channel.eventLoop().inEventLoop()) {
+        knownDisconnect = true;
+        channel.writeAndFlush(msg).addListener(ChannelFutureListener.CLOSE);
+      } else {
         channel.eventLoop().execute(() -> {
           knownDisconnect = true;
           channel.writeAndFlush(msg).addListener(ChannelFutureListener.CLOSE);
         });
       }
     }
+  }
 
   /**
    * Immediately closes the connection.
    */
   public void close() {
     if (channel.isActive()) {
+      if (channel.eventLoop().inEventLoop()) {
+        knownDisconnect = true;
         channel.close();
+      } else {
+        channel.eventLoop().execute(() -> {
+          knownDisconnect = true;
+          channel.close();
+        });
+      }
     }
   }