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

2 uses

	github.com/refraction-networking/utls (current package)
		u_common.go#L41: 	utlsFakeExtensionCustom             uint16 = 1234   // not IANA assigned, for ALPS
		u_handshake_messages.go#L96: 				extensions.AddUint16(utlsFakeExtensionCustom)