Letsencrypt-plesk

* Domain aliases support added
* IDN domains support
* Granular and reliable renew process: the extension now performs a daily check for certificates which are about to expire and renews them not earlier than 30 days before their expiration
* Replaced Python-based certbot with PHP-based client
* Fixed installation issues with python dependencies when 3rd-parties upgrade breaks compatibility
* Fixed python-related issues (virtualenv and so on) on Windows

* Fix certificates renew task broken in 1.3 (issue 77)

* Debian 6 is now supported
* No more conflicts with alt-python-virtualenv on CloudLinux
* Extension now ignores unsupported domains:
* Inactive (disabled/suspended) domains
* Wildcard subdomains
* Domains without web hosting
* IDN domains
* Fixed PHP Warning: Invalid argument supplied for foreach
* Users can now secure Plesk with www. prefix in hostname (issue 11)
* Store CLI options for certificate renewal (issue 46)

* Ability to use the certificate for Plesk (issue 11)
* Bugfix: Duplicate renew tasks if the original was changed
* Add note about monthly certificate renewal

* Ability to include www.domain.tld as an alternative domain name (issue 4)
* Save the previously used e-mail address (issue 17)

* Ubuntu 16 support
* Fix dist-upgrade issue on debian/ubuntu OSes