Instead of using `MNT_DETACH` to unmount the container's mqueue/shm mounts, force it... but only on daemon init and shutdown. This makes sure that these IPC mounts are cleaned up even when the daemon is killed. Signed-off-by: Brian Goff <cpuguy83@gmail.com> Upstream-commit: 78bd17e805b7514505455b10f2fd90962505a3ff Component: engine