Refine http redirect checks for master

master/hosts.conf

@@ -14,8 +14,16 @@ object Host "beholder" {
     disk_partitions = "/boot/efi"
   }
 
-  vars.http_vhosts["http redirect"] = {
+  vars.http_vhosts["http redirect v4"] = {
     http_uri = "/"
+    http_vhost = "beholder.cacert.org"
     http_headerstring = "Location: https://beholder.cacert.org/"
+    http_ipv4 = True
+  }
+  vars.http_vhosts["http redirect v6"] = {
+    http_uri = "/"
+    http_vhost = "beholder.cacert.org"
+    http_headerstring = "Location: https://beholder.cacert.org/"
+    http_ipv6 = True
   }
 }