[Module] Let's Encrypt

[fearworks]

The current changes are not stable yet. I will commit these updates tomorrow. The update will be published if i had tested all the functions.

But if you like, i can send you the current files via private message as ZIP package.

I don't mind waiting until you are ready to release it.

Also, it would be nice if you made the "Adding CAA entry on DNS for letsencrypt.org" optional within the admin settings as some people may not want their DNS messing with without permission

I have already modified the DNS Bind module on my servers to include the CAA (TYPE257) certificate in my domain DNS, and I imagine some others may already have this in place too. This is because I have previously been using a manual method of creating and adding Let's Encrypt certificates via SSH, so I needed it in place already

Thanks for your efforts!

Keith.