[6.0] 5b7a0ca50 Force haproxy onto "localhost" addresses, to make it possible to match syslog-output.

[Dridi Boukelmoune]

commit 5b7a0ca506d5a4b0712c4199dda1fc54f6079998
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date:   Tue May 29 16:00:21 2018 +0000

    Force haproxy onto "localhost" addresses, to make it possible to
    match syslog-output.

diff --git a/bin/varnishtest/vtc_haproxy.c b/bin/varnishtest/vtc_haproxy.c
index 88162a951..3cc12fe28 100644
--- a/bin/varnishtest/vtc_haproxy.c
+++ b/bin/varnishtest/vtc_haproxy.c
@@ -389,7 +389,7 @@ haproxy_build_backends(const struct haproxy *h, const char *vsb_data)
 			break;
 
 		*q++ = '\0';
-		sock = VTCP_listen_on(":0", NULL, 1, &err);
+		sock = VTCP_listen_on("localhost:0", NULL, 1, &err);
 		if (err != NULL)
 			vtc_fatal(h->vl,
 			    "Create listen socket failed: %s", err);