allow AXFR for exery zone?

Hello,

We run a hidden master for many zones.
We don't use "pattern:" but list every domain separate in nsd.conf.

Now I was ask to allow zone transfer for a validation process running  
on a dedicated host.
Beside rewriting the config file for /every/ zone statement to include  
"provide-xfr: <dedicated ip>"
is there a way to tell nsd: "this ip may transfer every zone without  
further restrictions" ?

Thanks,
Andreas