* Move app install dir from /opt to /var/www
* Revamp the way binaries are downloaded thanks to manifestv2 (no need to check for arch, etc)
* Remove custom helpers (exec_as, ynh_handle_app_migration)
* Rename LFS_KEY as LFS_JWT_SECRET and KEY as SECRET_KEY as named in app.ini
* Add JWT_SECRET for oauth and INTERNAL_TOKEN in app.ini
* update upstream sample app.ini URL
* Disable actions for now.
* Automatically add ssh permissions to the system user
* Remove support for upgrade before 1.6.4. Edit test_upgrade_from accordingly.
