Remove If-Modified-Since headers on included objects to get consistent

behaviour.

Submitted by:	 sky (ticket 267)



git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@3091 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/cache_vrt_esi.c

@@ -809,6 +809,7 @@ ESI_Deliver(struct sess *sp)
 		http_SetH(sp->http, HTTP_HDR_URL, eb->include.b);
 		if (eb->host.b != NULL)  {
 			http_Unset(sp->http, H_Host);
+			http_Unset(sp->http, H_If_Modified_Since);
 			http_SetHeader(sp->wrk, sp->fd, sp->http, eb->host.b);
 		}
 		sp->step = STP_RECV;