fix can't start with -it flag

[ningmingxiao]

Signed-off-by: ningmingxiao ning.mingxiao@zte.com.cn

[ningmingxiao]

fix #492

[AkihiroSuda]

docker start doesn't support tty

$ docker start --help

Usage:  docker start [OPTIONS] CONTAINER [CONTAINER...]

Start one or more stopped containers

Options:
  -a, --attach               Attach STDOUT/STDERR and forward signals
      --detach-keys string   Override the key sequence for detaching a container
  -i, --interactive          Attach container's STDIN

[AkihiroSuda]

For consistency with Docker, we have to detach tty

[ningmingxiao]

what should I do? change from return errors.New("got nil con with flagT=true") to return errors.New("got nil con")?

[AkihiroSuda]

Probably you should attach a dummy terminal, not the real terminal, to emulate Docker's behavior.
Needs further investigation.

[fahedouch]

Fixed by #1642 ?
@ningmingxiao cc

[ningmingxiao]

Fixed by #1642 ? @ningmingxiao cc
yes