Cleanup CNI Networks on reboot
CNI sometimes leaves Network information in /var/lib/cni/networks
when the system crashes or containers do not shut down properly.
This PR will cleanup these left over files, so that container engines
will get a clean enviroment when the system reboots.
Related to:
# /tmp/podman-run-* directory can contain content for Podman containers that have run
# for many days. This following line prevents systemd from removing this content.
-x /tmp/podman-run-.*
-d /run/podman 0700 root root
+x /tmp/podman-run-*
+D! /run/podman 0700 root root
+D! /var/lib/cni/networks
