Added ability to disable the join/leave notices by setting the message to null in the event. The join message is moved to the onJoinEvent rather than during login

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

@@ -83,7 +83,7 @@ public class NetLoginHandler extends NetHandler {
             ChunkCoordinates chunkcoordinates = entityplayer.world.l();
             netserverhandler.b((Packet) (new Packet1Login("", "", entityplayer.id, entityplayer.world.j(), (byte) entityplayer.world.m.g)));
             netserverhandler.b((Packet) (new Packet6SpawnPosition(chunkcoordinates.a, chunkcoordinates.b, chunkcoordinates.c)));
-            this.e.f.a((Packet) (new Packet3Chat("\u00A7e" + entityplayer.name + " joined the game.")));
+            // this.e.f.a((Packet) (new Packet3Chat("\u00A7e" + entityplayer.name + " joined the game.")));  // CraftBukkit - message moved to join event
             this.e.f.a(entityplayer);
             netserverhandler.a(entityplayer.locX, entityplayer.locY, entityplayer.locZ, entityplayer.yaw, entityplayer.pitch);
             this.e.c.a(netserverhandler);

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

@@ -90,7 +90,10 @@ public class NetServerHandler extends NetHandler implements ICommandListener {
         // Send the possibly modified leave message
         this.b.a((Packet) (new Packet255KickDisconnect( event.getReason() )));
         this.b.c();
-        this.d.f.a((Packet) (new Packet3Chat( event.getLeaveMessage() )));
+        leaveMessage = event.getLeaveMessage();
+        if (leaveMessage != null) {
+            this.d.f.a((Packet) (new Packet3Chat(leaveMessage)));
+        }
         // CraftBukkit end
 
         this.d.f.c(this.e);

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

@@ -21,6 +21,7 @@ import org.bukkit.entity.Player;
 import org.bukkit.event.Event;
 import org.bukkit.event.Event.Type;
 import org.bukkit.event.player.PlayerEvent;
+import org.bukkit.event.player.PlayerJoinEvent;
 import org.bukkit.event.player.PlayerLoginEvent;
 import org.bukkit.event.player.PlayerRespawnEvent;
 // CraftBukkit end
@@ -94,7 +95,15 @@ public class ServerConfigurationManager {
 
         entityplayer.world.a(entityplayer);
 
-        server.getPluginManager().callEvent(new PlayerEvent(PlayerEvent.Type.PLAYER_JOIN, server.getPlayer(entityplayer)));
+        PlayerJoinEvent playerJoinEvent = new PlayerJoinEvent(PlayerEvent.Type.PLAYER_JOIN, server.getPlayer(entityplayer), "\u00A7e" + entityplayer.name + " joined the game.");
+
+        server.getPluginManager().callEvent(playerJoinEvent);
+
+        String joinMessage = playerJoinEvent.getJoinMessage();
+
+        if (joinMessage != null) {
+            this.c.f.a((Packet) (new Packet3Chat(joinMessage)));
+        }
 
         ((WorldServer) entityplayer.world).manager.a(entityplayer);
         // CraftBukkit end