if etcdSecure {
		cfg.TLS = &tls.Config{
			RootCAs:                  rootCAs,
			PreferServerCipherSuites: true,
			MinVersion:               tls.VersionTLS12,
			NextProtos:               []string{"http/1.1", "h2"},
			ClientSessionCache:       tls.NewLRUClientSessionCache(64),
			CipherSuites:             crypto.TLSCiphersBackwardCompatible(),
			CurvePreferences:         crypto.TLSCurveIDs(),

	}

	l.LDAP = ldap.Config{
		ServerAddr:    ldapServer,
		SRVRecordName: getCfgVal(SRVRecordName),
		TLS: &tls.Config{
			ServerName:         host,
			MinVersion:         tls.VersionTLS12,
			NextProtos:         []string{"h2", "http/1.1"},
			ClientSessionCache: tls.NewLRUClientSessionCache(100),
			CipherSuites:       crypto.TLSCiphersBackwardCompatible(), // Contains RSA key exchange
			RootCAs:            rootCAs,
		},

	if getCert == nil {
		return nil
	}

	tlsConfig := &tls.Config{
		PreferServerCipherSuites: true,
		MinVersion:               tls.VersionTLS12,
		NextProtos:               []string{"http/1.1", "h2"},
		GetCertificate:           getCert,
		ClientSessionCache:       tls.NewLRUClientSessionCache(tlsClientSessionCacheSize),
	}

pkg crypto/tls, type Config struct, InsecureSkipVerify bool
pkg crypto/tls, type Config struct, NameToCertificate map[string]*Certificate
pkg crypto/tls, type Config struct, NextProtos []string
pkg crypto/tls, type Config struct, Rand io.Reader
pkg crypto/tls, type Config struct, RootCAs *x509.CertPool
pkg crypto/tls, type Config struct, ServerName string