Improve http client copying

Author: swithek

dial.go

@@ -59,11 +59,9 @@ func (opts *DialOptions) cloneWithDefaults() *DialOptions {
 		ctx, cancel = context.WithTimeout(ctx, opts.HTTPClient.Timeout)
 		defer cancel()
 
-		opts.HTTPClient = &http.Client{
-			Transport:     opts.HTTPClient.Transport,
-			CheckRedirect: opts.HTTPClient.CheckRedirect,
-			Jar:           opts.HTTPClient.Jar,
-		}
+		newClient := *opts.HTTPClient
+		newClient.Timeout = 0
+		opts.HTTPClient = &newClient
 	}
 	if o.HTTPHeader == nil {
 		o.HTTPHeader = http.Header{}