The configDir (and "DOCKER_CONFIG" environment variable) is now only used
for the default location for TLS certificates to secure the daemon API.
It is a leftover from when the "docker" and "dockerd" CLI shared the same
binary, allowing the DOCKER_CONFIG environment variable to set the location
for certificates to be used by both.

This patch merges it into cmd/dockerd, which is where it was used.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

The cli package is a leftover from when the "docker" and "dockerd" cli
were both maintained in this repository; the only consumer of this is
now the dockerd CLI, so we can move this code (it should not be imported
by anyone).

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Please refer to `docs/rootless.md`.

TLDR:
 * Make sure `/etc/subuid` and `/etc/subgid` contain the entry for you
 * `dockerd-rootless.sh --experimental`
 * `docker -H unix://$XDG_RUNTIME_DIR/docker.sock run ...`

Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>

remove unnescessary import aliases, brackets, and so on.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

dockerd has no subcommands, so the help command
is not used.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>