Add a printf when cached is ready for the benefit of varnishtester

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@444 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/cache_main.c

@@ -129,6 +129,7 @@ child_main(void)
 	event_base_set(eb, &ev_keepalive);
 	arm_keepalive();
 
+	printf("Ready\n");
 	i = event_base_loop(eb, 0);
 	if (i != 0)
 		printf("event_dispatch() = %d\n", i);