const crypto/tls.clientSignatureContext

3 uses

	crypto/tls (current package)
		auth.go#L108: 	clientSignatureContext = "TLS 1.3, client CertificateVerify\x00"
		handshake_client_tls13.go#L794: 	signed := signedMessage(clientSignatureContext, hs.transcript)
		handshake_server_tls13.go#L1100: 		signed := signedMessage(clientSignatureContext, hs.transcript)