Load containerd.d/*.toml next to the daemon configuration file when
using embedded containerd.
Only the plugins, disabled_plugins, and required_plugins settings
apply.
Require version 4 or later and reject nested imports, so the merge
order follows the lexical order of the files.
Warn when drop-ins are present but dockerd uses a system or managed
containerd, which ignore them.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
Paweł Gronowski
a7a3d813d0