TLSEXT_SIGALG_ecdsa_secp521r1_sha512_name
{ TLSEXT_SIGALG_ecdsa_secp521r1_sha512_name,
{ TLSEXT_SIGALG_ecdsa_secp521r1_sha512, TLSEXT_SIGALG_ecdsa_secp521r1_sha512_name },