[master] d32906f86 Check IPv6 in varnishtest dns feature

[Dridi Boukelmoune]

commit d32906f86aeee1fe462ced9897a31c6d40110ea8
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Fri Oct 4 10:17:49 2019 +0200

    Check IPv6 in varnishtest dns feature
    
    On a network where you can't trust the DNS resolver because it filters
    AAAA records out v00016.vtc fails.

diff --git a/bin/varnishtest/vtc_misc.c b/bin/varnishtest/vtc_misc.c
index d2c897f46..d49388352 100644
--- a/bin/varnishtest/vtc_misc.c
+++ b/bin/varnishtest/vtc_misc.c
@@ -352,13 +352,20 @@ dns_works(void)
 	char abuf[VTCP_ADDRBUFSIZE];
 	char pbuf[VTCP_PORTBUFSIZE];
 
-	sa = VSS_ResolveOne(NULL, "dns-canary.freebsd.dk", NULL, AF_UNSPEC, SOCK_STREAM, 0);
+	sa = VSS_ResolveOne(NULL, "dns-canary.freebsd.dk", NULL,
+	    AF_UNSPEC, SOCK_STREAM, 0);
 	if (sa == NULL)
 		return (0);
 	VTCP_name(sa, abuf, sizeof abuf, pbuf, sizeof pbuf);
 	free(sa);
 	if (strcmp(abuf, "192.0.2.255"))
 		return (0);
+
+	sa = VSS_ResolveOne(NULL, "varnish.org", NULL,
+	    AF_INET6, SOCK_STREAM, 0);
+	if (sa == NULL)
+		return (0);
+	free(sa);
 	return (1);
 }