const github.com/refraction-networking/utls/dicttls.TLS_ECDHE_ECDSA_WITH_AES_256_CCM

one use

	github.com/refraction-networking/utls/dicttls (current package)
		cipher_suites.go#L339: 	TLS_ECDHE_ECDSA_WITH_AES_256_CCM             uint16 = 0xC0AD