--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/github.com/gorilla/websocket/client_clone.go	Sat Sep 29 18:09:54 2018 +0200
@@ -0,0 +1,16 @@
+// Copyright 2013 The Gorilla WebSocket Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build go1.8
+
+package websocket
+
+import "crypto/tls"
+
+func cloneTLSConfig(cfg *tls.Config) *tls.Config {
+	if cfg == nil {
+		return &tls.Config{}
+	}
+	return cfg.Clone()
+}