source /etc/bash_completion.d/docker.io was not working for me, since the file is called docker, not docker.io. There might be versions with 'io' ending; star is general enough. Signed-off-by: Ferenc Szabo <pragmaticfrank@gmail.com> Upstream-commit: 112829434d5aa517a00d89c3b476233fa277eb94 Component: engine