bug#56678: certbot mcron job fails

[Bruno Victal]

Hi,

I've found out about step-ca <https://github.com/smallstep/certificates> which 
has a ACME server
implementation and could be used to write a self contained system test for 
certbot / ACME clients.

I didn't have much success packaging this for guix (it's written in go), 
perhaps someone more
acquainted with the go-build-system could look at this direction? Having 
automated tests for
certbot-service-type seems a worthwhile endeavor.


Cheers,
Bruno