Upgrade Caddy to version 1.0.4 with ACMEv2

We rolled out version 1.0.4 of the Caddy web server to all our setups which use on-demand “whitelabel” type of domains. All these certificates are now being requested and renewed against the ACMEv2 API.

ACMEv1 has been deprecated for a while and will stop allowing new domains in June 2020. In June 2021 it will be entirely disabled.