Major changes since 7.x-1.2:
After upgrading, you must check if you need to run the database upgrade script.
After upgrading, you should visit the setting page and make sure all the settings are the way you like them to be.
Changes since 8.x-3.0:
Fix a regression #3020747: Don't add SSL config to configuration files if the crt files aren't there/aren't readable. (especially redirects)
See the full release notes at: http://docs.aegirproject.org/en/3.x/release-notes/3.17/