Send a ready packet when initialization is done

server.c

@@ -205,6 +205,10 @@ server_start(struct event_base *base, int lockfd, char *lockfile)
 
 	status_prompt_load_history();
 
+#ifdef TMATE
+	tmate_write_ready();
+#endif
+
 	server_add_accept(0);
 
 	proc_loop(server_proc, server_loop);