const github.com/refraction-networking/utls.FAKE_OLD_TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256

one use

	github.com/refraction-networking/utls (current package)
		u_common.go#L62: 	FAKE_OLD_TLS_DHE_RSA_WITH_CHACHA20_POLY1305_SHA256 = uint16(0xcc15) // we can try to craft these ciphersuites