Fix ipv6 stuffs 2

internal/app.go

@@ -56,7 +56,7 @@ func MainApp(configPath string) {
 	if config.ShouldForceIPv6() {
 		ipv6List, err = hosts.FetchHosts(hosts.IPV6)
 		if err != nil {
-			panic(err)
+			zurglog.Warnf("Failed to fetch IPv6 hosts: %v", err)
 		}
 	}
 	downloadClient := http.NewHTTPClient(config.GetToken(), config.GetRetriesUntilFailed(), 0, ipv6List, config, log.Named("dlclient"))

pkg/http/client.go

@@ -127,14 +127,16 @@ func NewHTTPClient(token string, maxRetries int, timeoutSecs int, restrictToHost
 					}
 				}
 				if !found {
-					log.Warnf("Host %s is not an IPv6 host, replacing with a random host (ensure you have preferred_hosts properly set in your config.yml)", host)
+					log.Warnf("Host %s is not an IPv6 host (ensure you have preferred_hosts properly set in your config.yml, if unset, run `zurg network-test -t ipv6`)", host)
 					// replace with a random ipv6 host
 					restrictToHostsLen := len(restrictToHosts)
 					randomHost := restrictToHosts[rand.Intn(restrictToHostsLen)]
 					host = randomHost
+					log.Warnf("Replacing with a random IPv6 host: %s", host)
 					address = net.JoinHostPort(host, port)
 				}
 			}
+			// todo: replace .com with .cloud if needed
 			ips, err := net.DefaultResolver.LookupIPAddr(ctx, host)
 			if err != nil {
 				return nil, err