pfSense

Following up with a user's feature request on Reddit (https://www.reddit.com/r/PFSENSE/comments/p1o4fz/notifications_in_pfsense_again/h8geszd/) I had a go at creating an rc script to iterate all installed packages and file_notify if the package has an update available.

My GitHub repo with the additional rc file: https://github.com/GenericStudent/pfsense/blob/feature/package-update-notification/src/etc/rc.package_update_check

This works when using the cron package with the command: `/usr/bin/nice -n20 /etc/rc.package_update_check` but I was curious if:
- this isn't already in the pipeline (I did a quick search in Redmine but I'm new to this / here and didn't see anything relating)
- the method imployed isn't rediculous for this functionality
- there isn't a better method for executing scripts / code on the regular (without requiring extra Cron package that is)
- I should punt a pull request through as-is and we can discuss any better methods etc

Any feedback on any of this is welcomed due to my extreme green-ness to this process.

Many thanks in advanced,

Adam