Add max-player-auto-save-per-tick setting to spread out saves more

This will force the saves to spread over multiple ticks even when many
players auto save interval is aligned, avoiding spikes on large servers.

Closes #1021

Spigot-Server-Patches/Add-configuration-option-to-prevent-player-names-fro.patch

@@ -6,7 +6,7 @@ Subject: [PATCH] Add configuration option to prevent player names from being
 
 
 diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
-index 28917f63d..f4b237034 100644
+index ea6fcb39f..dbafef023 100644
 --- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
 +++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
 @@ -0,0 +0,0 @@ public class PaperConfig {
@@ -20,7 +20,7 @@ index 28917f63d..f4b237034 100644
 +    }
  }
 diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
-index 701c90679..50341ae6e 100644
+index 41357cb0e..27c6caddc 100644
 --- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
 +++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
 @@ -0,0 +0,0 @@ public final class CraftServer implements Server {

Spigot-Server-Patches/Add-option-to-remove-invalid-statistics.patch

@@ -5,12 +5,12 @@ Subject: [PATCH] Add option to remove invalid statistics
 
 
 diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
-index da0984a35..28917f63d 100644
+index 459c86bce..ea6fcb39f 100644
 --- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
 +++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
 @@ -0,0 +0,0 @@ public class PaperConfig {
-     private static void playerAutoSaveRate() {
-         playerAutoSaveRate = getInt("settings.player-auto-save-rate", -1);
+             maxPlayerAutoSavePerTick = (playerAutoSaveRate == -1 || playerAutoSaveRate > 100) ? 10 : 20;
+         }
      }
 +
 +    public static boolean removeInvalidStatistics = false;

Spigot-Server-Patches/Allow-specifying-a-custom-authentication-servers-dow.patch

@@ -6,7 +6,7 @@ Subject: [PATCH] Allow specifying a custom "authentication servers down" kick
 
 
 diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
-index f4b237034..f5cb9799b 100644
+index dbafef023..ec89ecfca 100644
 --- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
 +++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
 @@ -0,0 +0,0 @@

Spigot-Server-Patches/Auto-Save-Improvements.patch

@@ -12,7 +12,7 @@ Re-introduce a cap per tick for auto save (Spigot disabled the vanilla cap) and
 Adds incremental player auto saving too
 
 diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
-index 621c585e7..da0984a35 100644
+index 621c585e7..459c86bce 100644
 --- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
 +++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
 @@ -0,0 +0,0 @@ public class PaperConfig {
@@ -21,8 +21,14 @@ index 621c585e7..da0984a35 100644
      }
 +
 +    public static int playerAutoSaveRate = -1;
++    public static int maxPlayerAutoSavePerTick = 10;
 +    private static void playerAutoSaveRate() {
 +        playerAutoSaveRate = getInt("settings.player-auto-save-rate", -1);
++        maxPlayerAutoSavePerTick = getInt("settings.max-player-auto-save-per-tick", -1);
++        if (maxPlayerAutoSavePerTick == -1) { // -1 Automatic / "Recommended"
++            // 10 should be safe for everyone unless your mass spamming player auto save
++            maxPlayerAutoSavePerTick = (playerAutoSaveRate == -1 || playerAutoSaveRate > 100) ? 10 : 20;
++        }
 +    }
  }
 diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -155,7 +161,7 @@ index ab7933079..5c09c6ff7 100644
          this.methodProfiler.a("tallying");
          // Spigot start
 diff --git a/src/main/java/net/minecraft/server/PlayerList.java b/src/main/java/net/minecraft/server/PlayerList.java
-index ed5852ef4..0e82c16b7 100644
+index ed5852ef4..efea22c92 100644
 --- a/src/main/java/net/minecraft/server/PlayerList.java
 +++ b/src/main/java/net/minecraft/server/PlayerList.java
 @@ -0,0 +0,0 @@ public abstract class PlayerList {
@@ -178,11 +184,13 @@ index ed5852ef4..0e82c16b7 100644
 +    public void savePlayers(Integer interval) {
 +        long now = MinecraftServer.currentTick;
          MinecraftTimings.savePlayers.startTiming(); // Paper
++        int numSaved = 0; // Paper
          for (int i = 0; i < this.players.size(); ++i) {
 -            this.savePlayerFile((EntityPlayer) this.players.get(i));
 +            EntityPlayer entityplayer = this.players.get(i);
 +            if (interval == null || now - entityplayer.lastSave >= interval) {
 +                this.savePlayerFile(entityplayer);
++                if (interval != null && ++numSaved <= com.destroystokyo.paper.PaperConfig.maxPlayerAutoSavePerTick) { break; } // Paper
 +            }
          }
          MinecraftTimings.savePlayers.stopTiming(); // Paper

Spigot-Server-Patches/Enforce-Sync-Player-Saves.patch

@@ -7,7 +7,7 @@ Saving players async is extremely dangerous. This will force it to main
 the same way we handle async chunk loads.
 
 diff --git a/src/main/java/net/minecraft/server/PlayerList.java b/src/main/java/net/minecraft/server/PlayerList.java
-index 0e82c16b7..4080ed26c 100644
+index efea22c92..91136a8d8 100644
 --- a/src/main/java/net/minecraft/server/PlayerList.java
 +++ b/src/main/java/net/minecraft/server/PlayerList.java
 @@ -0,0 +0,0 @@ public abstract class PlayerList {
@@ -17,7 +17,7 @@ index 0e82c16b7..4080ed26c 100644
 +        MCUtil.ensureMain("Save Players", () -> { // Paper - ensure main
          long now = MinecraftServer.currentTick;
          MinecraftTimings.savePlayers.startTiming(); // Paper
-         for (int i = 0; i < this.players.size(); ++i) {
+         int numSaved = 0; // Paper
 @@ -0,0 +0,0 @@ public abstract class PlayerList {
              }
          }

Spigot-Server-Patches/Properly-handle-async-calls-to-restart-the-server.patch

@@ -78,7 +78,7 @@ index 13c6b5ccd..908a5d273 100644
          return this.serverThread;
      }
 diff --git a/src/main/java/net/minecraft/server/PlayerList.java b/src/main/java/net/minecraft/server/PlayerList.java
-index 4080ed26c..ff01bbff5 100644
+index 91136a8d8..cc6a209ea 100644
 --- a/src/main/java/net/minecraft/server/PlayerList.java
 +++ b/src/main/java/net/minecraft/server/PlayerList.java
 @@ -0,0 +0,0 @@ public abstract class PlayerList {