setup ignore update for .history files.

Subscription.h

@@ -31,7 +31,9 @@ namespace core
 
       bool ifSubscriber(TCPSession &session);
 
-//      void setHandler(SubscriptionHandler *handlers);
+      bool subInvite(TCPSession &session);
+
+      //      void setHandler(SubscriptionHandler *handlers);
 
       //      int processCommand(coreutils::ZString &request, TCPSession &session) override;