#2055: Mark inactive channels as closed

proxy/src/main/java/net/md_5/bungee/netty/ChannelWrapper.java

@@ -57,6 +57,11 @@ public class ChannelWrapper
         }
     }
 
+    public void markClosed()
+    {
+        closed = closing = true;
+    }
+
     public void close()
     {
         close( null );

proxy/src/main/java/net/md_5/bungee/netty/HandlerBoss.java

@@ -52,6 +52,7 @@ public class HandlerBoss extends ChannelInboundHandlerAdapter
     {
         if ( handler != null )
         {
+            channel.markClosed();
             handler.disconnected( channel );
 
             if ( !( handler instanceof InitialHandler || handler instanceof PingHandler ) )