More tweaks to Karst / Default player limit of 30

core/src/mindustry/net/NetConnection.java

@@ -28,6 +28,8 @@ public abstract class NetConnection{
     public long lastReceivedClientTime;
     /** Build requests that have been recently rejected. This is cleared every snapshot. */
     public Seq<BuildPlan> rejectedRequests = new Seq<>();
+    /** Handles chat spam rate limits. */
+    public Ratekeeper chatRate = new Ratekeeper();
 
     public boolean hasConnected, hasBegunConnecting, hasDisconnected;
     public float viewWidth, viewHeight, viewX, viewY;