name_prefix
name_prefix(dns_name_t *name, dns_name_t *origin, dns_name_t *target);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&rmail, tctx->origin, &prefix);
sub = name_prefix(&email, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&rmail, tctx->origin, &prefix);
sub = name_prefix(&email, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&mname, tctx->origin, &prefix);
sub = name_prefix(&rname, tctx->origin, &prefix);
sub = name_prefix(&prev, tctx->origin, &prefix);
sub = name_prefix(&next, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);
sub = name_prefix(&name, tctx->origin, &prefix);