Defaults for Podman that were previous applied as command-line arguments
to all `podman run` or `podman create` invocations are now specified in
a dedicated configuration file.
Services are also better identified against their name rather than the
generic `podman` ID derived from the `ExecStart` invocations.
This will help make subsequent synchronization with hosts easier, as
systemd files and potential dropins are guarnateed to exist under a
certain hierarchy that can be dropped as-is into host configuration
directories.