netxlite: utls for TLS parroting

This is the ground work for https://github.com/ooni/probe/issues/1424.

internal/netxlite/tlshandshaker_test.go

@@ -15,6 +15,7 @@ import (
 
 	"github.com/apex/log"
 	"github.com/ooni/probe-cli/v3/internal/netxmocks"
+	utls "gitlab.com/yawning/utls.git"
 )
 
 func TestTLSHandshakerConfigurableWithError(t *testing.T) {
@@ -177,3 +178,18 @@ func TestTLSHandshakerLoggerFailure(t *testing.T) {
 		t.Fatal("expected zero ConnectionState here")
 	}
 }
+
+func TestUTLSHandshakerChrome(t *testing.T) {
+	h := &TLSHandshakerConfigurable{
+		NewConn: NewConnUTLS(&utls.HelloChrome_Auto),
+	}
+	cfg := &tls.Config{ServerName: "google.com"}
+	conn, err := net.Dial("tcp", "google.com:443")
+	conn, _, err = h.Handshake(context.Background(), conn, cfg)
+	if err != nil {
+		t.Fatal("unexpected error", err)
+	}
+	if conn == nil {
+		t.Fatal("nil connection")
+	}
+}