az_add_additionals_from
if(!az_add_additionals_from(z, region, msg, rrset, 2))
if(!az_add_additionals_from(z, region, msg, rrset, 6))
if(!az_add_additionals_from(z, region, msg, rrset, 0))
if(!az_add_additionals_from(z, region, msg, rrset, 0)) return 0;
if(!az_add_additionals_from(z, region, msg, rrset, 2))
if(!az_add_additionals_from(z, region, msg, rrset, 6))
if(!az_add_additionals_from(z, region, msg, rrset, 0))
if(!az_add_additionals_from(z, region, msg, rrset, 0)) return 0;