[bug#30459] Certbot service patches

[Clément Lassieur]

Hi,

Here are a few patches that aim to improve the Certbot service.

One problem I have is that reconfiguring takes a bit too much time if
there are many certificates.  I wonder if there is a way to avoid
running 'certbot-activation' when the configuration didn't change.

Also, I had not reproducible networking issues while updating the
certificates, but they may be related to my deploy hooks and have
nothing to do with the service.

Comments welcome :-)

Clément