Do not use ForkJoinPool common exector for creating client command struct (Fixes #6936)

patches/server/0305-Async-command-map-building.patch

@@ -5,7 +5,7 @@ Subject: [PATCH] Async command map building
 
 
 diff --git a/src/main/java/net/minecraft/commands/Commands.java b/src/main/java/net/minecraft/commands/Commands.java
-index cc2337ee8a00fab8919a61324899113370bc5018..b28dc3f176221a6d6efb35af11b54777299b9242 100644
+index cc2337ee8a00fab8919a61324899113370bc5018..ee31455158afbed8f3bbac57d2f41a59d01a0670 100644
 --- a/src/main/java/net/minecraft/commands/Commands.java
 +++ b/src/main/java/net/minecraft/commands/Commands.java
 @@ -30,6 +30,7 @@ import net.minecraft.network.chat.MutableComponent;
@@ -16,14 +16,12 @@ index cc2337ee8a00fab8919a61324899113370bc5018..b28dc3f176221a6d6efb35af11b54777
  import net.minecraft.server.commands.AdvancementCommands;
  import net.minecraft.server.commands.AttributeCommand;
  import net.minecraft.server.commands.BanIpCommands;
-@@ -344,6 +345,14 @@ public class Commands {
+@@ -344,6 +345,12 @@ public class Commands {
          if ( org.spigotmc.SpigotConfig.tabComplete < 0 ) return; // Spigot
          // CraftBukkit start
          // Register Vanilla commands into builtRoot as before
 +        // Paper start - Async command map building
-+        java.util.concurrent.ForkJoinPool.commonPool().execute(() -> {
++        net.minecraft.server.MCUtil.scheduleAsyncTask(() -> this.sendAsync(player));
-+            sendAsync(player);
-+        });
 +    }
 +
 +    private void sendAsync(ServerPlayer player) {
@@ -31,7 +29,7 @@ index cc2337ee8a00fab8919a61324899113370bc5018..b28dc3f176221a6d6efb35af11b54777
          Map<CommandNode<CommandSourceStack>, CommandNode<SharedSuggestionProvider>> map = Maps.newIdentityHashMap(); // Use identity to prevent aliasing issues
          RootCommandNode vanillaRoot = new RootCommandNode();
  
-@@ -361,7 +370,14 @@ public class Commands {
+@@ -361,7 +368,14 @@ public class Commands {
          for (CommandNode node : rootcommandnode.getChildren()) {
              bukkit.add(node.getName());
          }

patches/server/0306-Implement-Brigadier-Mojang-API.patch

@@ -61,10 +61,10 @@ index 9f79c949d18c1ff3bdb49780fcecfc75366a8ff6..530a09fa3c9155459c6a4519e3412408
      public boolean hasPermission(int level) {
          // CraftBukkit start
 diff --git a/src/main/java/net/minecraft/commands/Commands.java b/src/main/java/net/minecraft/commands/Commands.java
-index b28dc3f176221a6d6efb35af11b54777299b9242..6624045921ef64046b375ec787cadda1e8c8435b 100644
+index ee31455158afbed8f3bbac57d2f41a59d01a0670..4049576478efed97092b7e1b3d40afda6b114d68 100644
 --- a/src/main/java/net/minecraft/commands/Commands.java
 +++ b/src/main/java/net/minecraft/commands/Commands.java
-@@ -371,6 +371,7 @@ public class Commands {
+@@ -369,6 +369,7 @@ public class Commands {
              bukkit.add(node.getName());
          }
          // Paper start - Async command map building
@@ -72,7 +72,7 @@ index b28dc3f176221a6d6efb35af11b54777299b9242..6624045921ef64046b375ec787cadda1
          MinecraftServer.getServer().execute(() -> {
             runSync(player, bukkit, rootcommandnode);
          });
-@@ -378,6 +379,7 @@ public class Commands {
+@@ -376,6 +377,7 @@ public class Commands {
  
      private void runSync(ServerPlayer player, Collection<String> bukkit, RootCommandNode<SharedSuggestionProvider> rootcommandnode) {
          // Paper end - Async command map building
@@ -81,7 +81,7 @@ index b28dc3f176221a6d6efb35af11b54777299b9242..6624045921ef64046b375ec787cadda1
          event.getPlayer().getServer().getPluginManager().callEvent(event);
  
 diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
-index 2d2b1a293a1359ffa6d33635856406a909c452ce..be5f7b5e8537aa3bf4088fa8c2e9d6cce17c64ac 100644
+index d4760d3cd2037ae47258d6016c6303e0a295dcbc..d0ed45db0226ebd8f60e9d84b7f41a3ca5cb3c9b 100644
 --- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
 +++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
 @@ -747,8 +747,12 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser