Move patches over, start with first few

patches/unapplied/server/Don-t-mark-dirty-in-invalid-locations-SPIGOT-6086.patch

@@ -0,0 +1,18 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Mariell Hoversholm <proximyst@proximyst.com>
+Date: Sun, 27 Sep 2020 16:25:24 +0200
+Subject: [PATCH] Don't mark dirty in invalid locations (SPIGOT-6086)
+
+
+diff --git a/src/main/java/net/minecraft/server/level/ChunkHolder.java b/src/main/java/net/minecraft/server/level/ChunkHolder.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/net/minecraft/server/level/ChunkHolder.java
++++ b/src/main/java/net/minecraft/server/level/ChunkHolder.java
+@@ -0,0 +0,0 @@ public class ChunkHolder {
+     }
+ 
+     public void blockChanged(BlockPos pos) {
++        if (!pos.isInsideBuildHeightAndWorldBoundsHorizontal(levelHeightAccessor)) return; // Paper - SPIGOT-6086 for all invalid locations; avoid acquiring locks
+         LevelChunk chunk = this.getTickingChunk();
+ 
+         if (chunk != null) {