KRB5_PA_PAC_OPTIONS_RBCD
pac_options->options &= KRB5_PA_PAC_OPTIONS_RBCD;
if (pac_options->options & KRB5_PA_PAC_OPTIONS_RBCD)
if (!(pac_options->options & KRB5_PA_PAC_OPTIONS_RBCD))
pac_options.options |= KRB5_PA_PAC_OPTIONS_RBCD;