const crypto/tls.alertMissingExtension

4 uses

	crypto/tls (current package)
		alert.go#L42: 	alertMissingExtension             alert = 109
		alert.go#L78: 	alertMissingExtension:             "missing extension",
		handshake_client_tls13.go#L112: 		c.sendAlert(alertMissingExtension)
		handshake_server_tls13.go#L374: 		return c.sendAlert(alertMissingExtension)