Hide sync chunk writes behind flag

Spigot-Server-Patches/0520-Hide-sync-chunk-writes-behind-flag.patch

@@ -0,0 +1,23 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Spottedleaf <Spottedleaf@users.noreply.github.com>
+Date: Fri, 26 Jun 2020 22:35:08 -0700
+Subject: [PATCH] Hide sync chunk writes behind flag
+
+Syncing writes on each write call has terrible performance
+on harddrives.
+
+-DPaper.enable-sync-chunk-writes=true to enable
+
+diff --git a/src/main/java/net/minecraft/server/DedicatedServerProperties.java b/src/main/java/net/minecraft/server/DedicatedServerProperties.java
+index 1122861a8f9c12668e7bd9d65e63fc9166a66d1a..6786fd0947724069366a2375c710ec518a92f2b1 100644
+--- a/src/main/java/net/minecraft/server/DedicatedServerProperties.java
++++ b/src/main/java/net/minecraft/server/DedicatedServerProperties.java
+@@ -98,7 +98,7 @@ public class DedicatedServerProperties extends PropertyManager<DedicatedServerPr
+         this.maxWorldSize = this.a("max-world-size", (integer) -> {
+             return MathHelper.clamp(integer, 1, 29999984);
+         }, 29999984);
+-        this.syncChunkWrites = this.getBoolean("sync-chunk-writes", true);
++        this.syncChunkWrites = this.getBoolean("sync-chunk-writes", true) && Boolean.getBoolean("Paper.enable-sync-chunk-writes"); // Paper - hide behind flag
+         this.enableJmxMonitoring = this.getBoolean("enable-jmx-monitoring", false);
+         this.enableStatus = this.getBoolean("enable-status", true);
+         this.entityBroadcastRangePercentage = this.a("entity-broadcast-range-percentage", (integer) -> {