- Traefik: Use Jinja template for `ssl_config_template` parameter (Jinja context match the ddb.yml configuration).
- Traefik: Add `extra_services` in `traefik` feature. Extra service allow to configure a service running
outside of the docker stack inside traefik, so it's included in the docker network and still benefits of
docker-devbox features (domain name, SSL certificates, ...).
- Version: Make detached repo report the effective branch instead of `HEAD`.