Default implementation provides a backward compatible solution
and fixes the issue where the "--quiet" argument doesn't exist
anymore in Ubuntu 16.04's default installation of letsencrypt.
- introduces a variable certbot_from_git
- adds install from package tasks
- makes a variable called certbot_script available (to handle certbot vs certbot-auto naming)
- fixes#18
this is a preparation for installing certbot from package management
additionally, it might be useful when further tasks are added, e.g. for initial certificate retrieval
Dieter Provoost
exploide
Oskar Schöldström
Kaurin
Jeff Geerling