Add a config flag to disable plausible.io calls

[ldidry]

Even if I know plausible.io is a privacy-friendly analytics service, I would like to be able to deactivate it in the configuration file, since it’s no use for someone who don’t have a plausible.io account like me.

Good job on wishthis, by the way ! 👍

[grandeljay]

Sounds good to me and thank you!