This commit contains changes for docker: * user.GetGroupFile to user.GetGroupPath docker/libcontainer#301 * Add systemd support for OOM docker/libcontainer#307 * Support for custom namespaces docker/libcontainer#279, docker/libcontainer#312 * Fixes #9699 docker/libcontainer#308 Signed-off-by: Alexander Morozov <lk4d4@docker.com> Upstream-commit: 50905a6d6ce2fdd1ab0c33ec0b7a26895e0cbeea Component: engine