Clean up headers

Add missing comments and clearly separate methods from attributes.
diff --git a/common/rfb/VNCSConnectionST.h b/common/rfb/VNCSConnectionST.h
index d09f733..1b7d59a 100644
--- a/common/rfb/VNCSConnectionST.h
+++ b/common/rfb/VNCSConnectionST.h
@@ -100,6 +100,9 @@
     bool needRenderedCursor();
 
     network::Socket* getSock() { return sock; }
+
+    // Change tracking
+
     void add_changed(const Region& region) { updates.add_changed(region); }
     void add_copied(const Region& dest, const Point& delta) {
       updates.add_copied(dest, delta);
@@ -152,6 +155,7 @@
     void setLEDState(unsigned int state);
     void setSocketTimeouts();
 
+  private:
     network::Socket* sock;
     CharArray peerEndpoint;
     bool reverseConnection;