the documentations says that you can drop "a file" into the `docker.service.d` directory, but does not note that the file must end with `.conf` in order to be recognized by systemd. This can lead to some [confusion][] if readers are not previously familiar with systemd. [confusion]: https://botbot.me/freenode/docker/2016-05-06/?msg=65605541&page=11 Signed-off-by: Lars Kellogg-Stedman <lars@redhat.com> Upstream-commit: 987b03054af8bfa5147465d4fe5d5a554cd5fee3 Component: engine