Disable delayed chunk unloads by default

While the option remains a powerful tool we recommend everyone use, 30s is
proving to be a bit much for certain gametypes and many admins are confused
that after updating they are now facing extreme loaded chunk counts.

We do recommend experienced users configure this value as needed, but we
cannot keep it as a default option given the variety of gametypes, the
potential inexperience of new users, and previous users upgrading and
now facing extreme chunk counts that offer little benefit.

Spigot-Server-Patches/0161-Delay-Chunk-Unloads-based-on-Player-Movement.patch

@@ -1,4 +1,4 @@
-From 4386477ab987b1a8eb91d3efcac70e53ca77833f Mon Sep 17 00:00:00 2001
+From 54b4193c57fd00f93d585132e60ae22d9f0310de Mon Sep 17 00:00:00 2001
 From: Aikar <aikar@aikar.co>
 Date: Sat, 18 Jun 2016 23:22:12 -0400
 Subject: [PATCH] Delay Chunk Unloads based on Player Movement
@@ -17,7 +17,7 @@ This allows servers with smaller worlds who do less long distance exploring to s
 wasting cpu cycles on saving/unloading/reloading chunks repeatedly.
 
 diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
-index 0d2af96..bc41b7e 100644
+index 0d2af96..327a784 100644
 --- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
 +++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
 @@ -364,6 +364,15 @@ public class PaperWorldConfig {
@@ -26,7 +26,7 @@ index 0d2af96..bc41b7e 100644
  
 +    public long delayChunkUnloadsBy;
 +    private void delayChunkUnloadsBy() {
-+        delayChunkUnloadsBy = PaperConfig.getSeconds(getString("delay-chunk-unloads-by", "30s"));
++        delayChunkUnloadsBy = PaperConfig.getSeconds(getString("delay-chunk-unloads-by", "0s"));
 +        if (delayChunkUnloadsBy > 0) {
 +            log("Delaying chunk unloads by " + delayChunkUnloadsBy + " seconds");
 +            delayChunkUnloadsBy *= 1000;