krb5_pa_svr_referral_data
FIELDOF_NORM(krb5_pa_svr_referral_data, realm_of_principal, principal, 0),
FIELDOF_OPT(krb5_pa_svr_referral_data, principal, principal, 1, 1),
DEFSEQTYPE(pa_svr_referral_data, krb5_pa_svr_referral_data, pa_svr_referral_data_fields, 0);