const crypto/tls.alertProtocolVersion

8 uses

	crypto/tls (current package)
		alert.go#L46: 	alertProtocolVersion              alert = 70
		alert.go#L83: 	alertProtocolVersion:              "protocol version not supported",
		conn.go#L649: 		c.sendAlert(alertProtocolVersion)
		conn.go#L662: 		c.sendAlert(alertProtocolVersion)
		handshake_client.go#L525: 		c.sendAlert(alertProtocolVersion)
		handshake_client_tls13.go#L55: 		c.sendAlert(alertProtocolVersion)
		handshake_server.go#L165: 		c.sendAlert(alertProtocolVersion)
		handshake_server_tls13.go#L273: 				c.sendAlert(alertProtocolVersion)