• Add command line switch to cancel renewal (#654)
• Fix bug that caused modules to survive cleanup by the IIS validation (noted in #653, #643, #627)
• Improved SelfHosting validation to only intercept requests with /.well-known/acme-challenge/ in the path, keeping port 80 free for normal traffic. Due to this fix the SelfHosting plugin is also promoted to be the new recommended validation mode.