name_duporclone
RETERR(name_duporclone(&alg, &tsig->algorithm));
RETERR(name_duporclone(&name, &cname->cname));
RETERR(name_duporclone(&name, &ns->name));
RETERR(name_duporclone(&name, &soa->origin));
result = name_duporclone(&name, &soa->contact);