it needs the plugin too

only useful for debugging failed test runs

at least, maybe.  we don't actually get any zkaps from this as of now.

Put it into a language that I can more easily maintain

The issuer runs.  Helpers to poke the right API calls into the right place
forthcoming...

Add an end-to-end system test for Tahoe-LAFS storage interaction.

just need 35 more hosts and then defining the function will be a win ...

Also improve failure reporting.

Support configuration for the issuer location.

Depend on ZKAPAuthorizer's overlays for anything ZKAPAuthorizer requires.

It knows better than we do about its own dependencies.  Let it control them.

It is better than what we have here and duplicating it is sad.  ZKAPAuthorizer
also has much tighter binding to Tahoe-LAFS version than anything in this
repository so it makes sense to let it dictate that detail.

Also bump the version being used.  This will be important in a minute.

Add NixOS and morph configuration for the testing and production grids.

Configurable public address

100TB NixOS configuration

Also open the firewall!  Yea.  That is a pretty important thing.