This is a small Docker compat fix with the API exec endpoints.
With Docker, sending a bare Exec Create (command only, nothing
else set) and then an Exec Start without Detach set performs
a detached exec. With Podman, we threw an error that at least one
stream must be attached to. Fix is trivial; look up the session
before start, check the config for attach streams, and force
detach on if none are set.
Signed-off-by: Matthew Heon <matthew.heon@pm.me>
Matthew Heon
7487854f10