vendor: add github.com/gregjones/httpcache/redis

vendor/github.com/garyburd/redigo/redis/pre_go17.go

@@ -0,0 +1,31 @@
+// +build !go1.7
+
+package redis
+
+import "crypto/tls"
+
+// similar cloneTLSClientConfig in the stdlib, but also honor skipVerify for the nil case
+func cloneTLSClientConfig(cfg *tls.Config, skipVerify bool) *tls.Config {
+	if cfg == nil {
+		return &tls.Config{InsecureSkipVerify: skipVerify}
+	}
+	return &tls.Config{
+		Rand:                     cfg.Rand,
+		Time:                     cfg.Time,
+		Certificates:             cfg.Certificates,
+		NameToCertificate:        cfg.NameToCertificate,
+		GetCertificate:           cfg.GetCertificate,
+		RootCAs:                  cfg.RootCAs,
+		NextProtos:               cfg.NextProtos,
+		ServerName:               cfg.ServerName,
+		ClientAuth:               cfg.ClientAuth,
+		ClientCAs:                cfg.ClientCAs,
+		InsecureSkipVerify:       cfg.InsecureSkipVerify,
+		CipherSuites:             cfg.CipherSuites,
+		PreferServerCipherSuites: cfg.PreferServerCipherSuites,
+		ClientSessionCache:       cfg.ClientSessionCache,
+		MinVersion:               cfg.MinVersion,
+		MaxVersion:               cfg.MaxVersion,
+		CurvePreferences:         cfg.CurvePreferences,
+	}
+}