docker/docker — pull request #9208 by duglin (2014-11-17 23:58:59+00:00)
Title: Add support for docker exec to return cmd exitStatus

Closes #8703

Also made it so that when "docker exec" is run with -d (detached mode)
it'll print the id of the exec to the screen like "docker run -d" does
so people can query it via:
curl http://.../exec/{id}/json

Signed-off-by: Doug Davis