Timeout pipe connections after 600 seconds.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@711 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishd/cache_pipe.c

@@ -78,8 +78,9 @@ PipeSession(struct sess *sp)
 	while (fds[0].events || fds[1].events) {
 		fds[0].revents = 0;
 		fds[1].revents = 0;
-		i = poll(fds, 2, INFTIM);
-		assert(i > 0);
+		i = poll(fds, 2, 600000);
+		if (i != 1)
+			break;
 		if (fds[0].revents)
 			rdf(fds, 0);
 		if (fds[1].revents)