Update player chat session sync (#12382)

paper-server/patches/sources/net/minecraft/server/players/PlayerList.java.patch

@@ -756,7 +756,7 @@
  
          return serverPlayer;
      }
-@@ -488,24 +_,60 @@
+@@ -488,24 +_,59 @@
      }
  
      public void sendActiveEffects(LivingEntity entity, ServerGamePacketListenerImpl connection) {
@@ -800,12 +800,11 @@
  
 +    // CraftBukkit start - add a world/entity limited version
 +    public void broadcastAll(Packet packet, net.minecraft.world.entity.player.Player entityhuman) {
-+        for (int i = 0; i < this.players.size(); ++i) {
-+            ServerPlayer entityplayer =  this.players.get(i);
++        for (ServerPlayer entityplayer : this.players) { // Paper - replace for i with for each for thread safety
 +            if (entityhuman != null && !entityplayer.getBukkitEntity().canSee(entityhuman.getBukkitEntity())) {
 +                continue;
 +            }
-+            ((ServerPlayer) this.players.get(i)).connection.send(packet);
++            ((ServerPlayer) entityplayer).connection.send(packet); // Paper - replace for i with for each for thread safety
 +        }
 +    }
 +