Only open_by_handle_at requires CAP_DAC_READ_SEARCH. This allows systemd to run with only `--cap-add SYS_ADMIN` rather than having to also add `--cap-add DAC_READ_SEARCH` as well which it does not really need. Signed-off-by: Justin Cormack <justin.cormack@docker.com> Upstream-commit: c1ca124682a90f3306b34ad104ba80e413f7bf88 Component: engine