Update Paper to 1.13 proper - THIS IS STILL HIGHLY UNSTABLE

DO NOT RUN ON PRODUCTION SERVERS!!! Use Backups!!

Spigot-Server-Patches/Block-player-logins-during-server-shutdown.patch

@@ -5,13 +5,13 @@ Subject: [PATCH] Block player logins during server shutdown
 
 
 diff --git a/src/main/java/net/minecraft/server/LoginListener.java b/src/main/java/net/minecraft/server/LoginListener.java
-index 89a11a496..bab13a4fd 100644
+index b6e829682..85eff6e2d 100644
 --- a/src/main/java/net/minecraft/server/LoginListener.java
 +++ b/src/main/java/net/minecraft/server/LoginListener.java
 @@ -0,0 +0,0 @@ public class LoginListener implements PacketLoginInListener, ITickable {
      }
  
-     public void X_() {
+     public void Y_() {
 +        // Paper start - Do not allow logins while the server is shutting down
 +        if (!MinecraftServer.getServer().isRunning()) {
 +            this.disconnect(new ChatMessage(org.spigotmc.SpigotConfig.restartMessage));