bug#30748: [PATCH] gnu: Add nsd.

[Tobias Geerinckx-Rice]

Guix,

I've pushed an updated NSD as 
7382ecd81859de878b22a6510b8262abe69d38bf. We're now one server 
(PowerDNS) away from having all major name servers in Guix, though 
not all have services.

Thanks for the reviews, Marius & Danny! I never understood what's 
obscure about the regex, but I tried to make it a bit more 
self-explanatory.

Kind regards,

T G-R