correctly handle nameservers in delegated zones that don't require glue
correctly handle nameservers in delegated zones that don't require glue

drkitty/cyder,OSU-Net/cyder,akeym/cyder,OSU-Net/cyder,akeym/cyder,murrown/cyder,akeym/cyder,OSU-Net/cyder,murrown/cyder,murrown/cyder,akeym/cyder,drkitty/cyder,OSU-Net/cyder,drkitty/cyder,drkitty/cyder,murrown/cyder