* Do not await containers when there was an error on scaling
* Add test case for usage with socket proxy
* Add documentation on required permissions for docker-socket-proxy
* Add full list of used Docker APIs to doc
* CONTAINER_START and CONTAINER_STOP is not needed
* Query for labeled services as well
* Try scaling down services
* Scale services back up
* Use progress tool from Docker CLI
* In test, label both services
* Clean up error and log messages
* Document scale-up/down approach in docs
* Downgrade Docker CLI to match client
* Document services stats
* Do not rely on PreviousSpec for storing desired replica count
* Log warnings from Docker when updating services
* Check whether container and service labels collide
* Document script behavior on label collision
* Add additional check if all containers have been removed
* Scale services concurrently
* Move docker interaction code into own file
* Factor out code for service updating
* Time out after five minutes of not reaching desired container count
* Inline handling of in-swarm container level restart
* Timer is more suitable for timeout race
* Timeout when scaling down services should be configurable
* Choose better filename
* Reflect changes in naming
* Rename and deprecate BACKUP_STOP_CONTAINER_LABEL
* Improve logging
* Further simplify logging
