Issue was caused when exec is tarted, exits, then stated again.
In this case, `Close` is called twice, which closes a channel twice.
Changes execConfig.ExitCode to a pointer so we can test if the it has
been set or not.
This allows us to return early when the exec has already been run.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Implement configurable detach keys (for `attach`, exec`, `run` and
`start`) using the client-side configuration
- Adds a `--detach-keys` flag to `attach`, `exec`, `run` and `start`
commands.
- Adds a new configuration field (in `~/.docker/config.json`) to
configure the default escape keys for docker client.
Signed-off-by: Vincent Demeester <vincent@sbr.pm>
Remove double reference between containers and exec configurations by
keeping only the container id.
Signed-off-by: David Calavera <david.calavera@gmail.com>
