Add a custom shutdown message set in bukkit.yml. Addresses BUKKIT-3031

src/main/java/net/minecraft/server/NetServerHandler.java

@@ -142,7 +142,10 @@ public class NetServerHandler extends NetHandler {
             String leaveMessage = "\u00A7e" + this.player.name + " left the game.";
 
             PlayerKickEvent event = new PlayerKickEvent(this.server.getPlayer(this.player), s, leaveMessage);
-            this.server.getPluginManager().callEvent(event);
+
+            if (this.server.getServer().isRunning()) {
+                this.server.getPluginManager().callEvent(event);
+            }
 
             if (event.isCancelled()) {
                 // Do not kick the player

src/main/java/net/minecraft/server/ServerConfigurationManagerAbstract.java

@@ -824,7 +824,7 @@ public abstract class ServerConfigurationManagerAbstract {
 
     public void r() {
         while (!this.players.isEmpty()) {
-            ((EntityPlayer) this.players.get(0)).netServerHandler.disconnect("Server closed");
+            ((EntityPlayer) this.players.get(0)).netServerHandler.disconnect(this.server.server.getShutdownMessage()); // CraftBukkit - add custom shutdown message
         }
     }
 }