const github.com/refraction-networking/utls/dicttls.TLS_ECDH_RSA_WITH_NULL_SHA

one use

	github.com/refraction-networking/utls/dicttls (current package)
		cipher_suites.go#L177: 	TLS_ECDH_RSA_WITH_NULL_SHA                   uint16 = 0xC00B