Make sure backend connections are blocking before we need them to be.

git-svn-id: http://www.varnish-cache.org/svn/trunk@2705 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/cache_fetch.c

@@ -317,10 +317,10 @@ Fetch(struct sess *sp)
 	st->len = st->space;
 	WS_Assert(sp->obj->ws_o);
 	http_Setup(sp->obj->http, sp->obj->ws_o);
-
 	vc = VBE_GetFd(sp);
 	if (vc == NULL)
 		return (__LINE__);
+	TCP_blocking(vc->fd);	/* XXX: we should timeout instead */
 	WRK_Reset(w, &vc->fd);
 	http_Write(w, hp, 0);
 

bin/varnishd/cache_pipe.c

@@ -80,6 +80,7 @@ PipeSession(struct sess *sp)
 	vc = VBE_GetFd(sp);
 	if (vc == NULL)
 		return;
+	TCP_blocking(vc->fd);
 
 	WRK_Reset(w, &vc->fd);
 	w->acct.hdrbytes += http_Write(w, bereq->http, 0);