• Upgrade Certbot to version 0.24.0
• Upgrade Lexicon to version 2.3.0: a lot of stability improvments, in particular for Namecheap provider, and added providers Constellix, Linode V4 and Subreg
• Add LEXICON_OPTIONS environment variable for specific lexicon options
• Correct domains.conf parsing when there is no newline on the end of the file
• Improved documentation
• Removed unsused code