rewrite chunk system checkpoint

patches/server/0570-Expose-protocol-version.patch

@@ -1,22 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Nassim Jahnke <nassim@njahnke.dev>
-Date: Fri, 26 Mar 2021 11:23:17 +0100
-Subject: [PATCH] Expose protocol version
-
-
-diff --git a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
-index 44850ec4a8245bc534efb85008486dd6f599b2e4..fb24efa54510fc77a7d4541462242113e16d2f53 100644
---- a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
-+++ b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
-@@ -544,6 +544,11 @@ public final class CraftMagicNumbers implements UnsafeValues {
-     public io.papermc.paper.inventory.ItemRarity getItemStackRarity(org.bukkit.inventory.ItemStack itemStack) {
-         return io.papermc.paper.inventory.ItemRarity.values()[getItem(itemStack.getType()).getRarity(CraftItemStack.asNMSCopy(itemStack)).ordinal()];
-     }
-+
-+    @Override
-+    public int getProtocolVersion() {
-+        return net.minecraft.SharedConstants.getCurrentVersion().getProtocolVersion();
-+    }
-     // Paper end
- 
-     /**