sysutils/podman: Fix panic when using network=host

If using host-based networking, instead of default VNET, some podman commands
including inspect could fail:

podman run -d --network=host ghcr.io/freebsd/freebsd-notoolchain:15.0 /bin/sh
podman inspect --latest

See https://github.com/containers/podman/issues/28289 for details.

While here, appease portclippy & portfmt

Reviewed by: dfr
Obtained from: dfr
Sponsored by: SkunkWerks, GmbH