nar-herder 0-9.5acfcc0 Utility for managing and serving nars

The Nar Herder is a utility for managing a collection of nars (normalized archives, in the context of Guix) along with the corresponding narinfo files which contain some signed metadata.

It can assist in serving a collection of nars, moving them between machines, or mirroring an existing collection of nars.

It's currently a working prototype, many designed features aren't implemented, and the error handling is very rough.