rewrite chunk system checkpoint

patches/server/Expose-client-protocol-version-and-virtual-host.patch

@@ -64,9 +64,9 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 --- a/src/main/java/net/minecraft/network/Connection.java
 +++ b/src/main/java/net/minecraft/network/Connection.java
 @@ -0,0 +0,0 @@ public class Connection extends SimpleChannelInboundHandler<Packet<?>> {
-     private int tickCount;
-     private boolean handlingFault;
-     public String hostname = ""; // CraftBukkit - add field
+         }
+     }
+     // Paper end - add pending task queue
 +    // Paper start - NetworkClient implementation
 +    public int protocolVersion;
 +    public java.net.InetSocketAddress virtualHost;