const github.com/refraction-networking/utls.utlsExtensionECH

4 uses

	github.com/refraction-networking/utls (current package)
		u_common.go#L42: 	utlsExtensionECH                    uint16 = 0xfe0d // draft-ietf-tls-esni-17
		u_ech.go#L182: 	b[0] = byte(utlsExtensionECH >> 8)
		u_ech.go#L183: 	b[1] = byte(utlsExtensionECH & 0xFF)
		u_tls_extensions.go#L80: 	case utlsExtensionECH: