Use vendoring for backward compatibility The switch of the Madon library to Go modules breaks builds with Go version < 1.11 since the import path now contains "v2". This patch adds vendoring so that it can still build with those versions. Let's try to re-enable Travis builds with Go v1.8-1.11...

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// +build !go1.8

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package websocket

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import (

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	"crypto/tls"

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	"net/http/httptrace"

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)

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func doHandshakeWithTrace(trace *httptrace.ClientTrace, tlsConn *tls.Conn, cfg *tls.Config) error {

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	return doHandshake(tlsConn, cfg)

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}