Do not use worldgen executor for api profile completions

We cannot put blocking network I/O onto the worldgen threads,
this will crash the server if it stalls

patches/server/0613-Expose-protocol-version.patch

@@ -0,0 +1,22 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Nassim Jahnke <jahnke.nassim@gmail.com>
+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 599c948db312dc6e416d9f67ec072c16bf2cab74..a978c39049efb30fcb66703b708a0e40868e2a58 100644
+--- a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
++++ b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
+@@ -536,6 +536,11 @@ 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
+ 
+     /**