Santa should have a way to limit what's logged in santa.log

[pmarkowsky]

It would be nice to have a filter that allows you to decide which events are / are not logged into the logs in /var/db/santa/.

I propose but am not wedded to the following:

• Assign each event a number
• Create a bitmask where all ones means all events
• Check the bitmask and only log the events that are enabled in the bitmask.
• Create a new option in the config LogFilter that by default logs all events.
• Create a string mapping of fields to be set in the option similar to the USB options.

[mlw]

Further, when events that are configured to be filtered are not needed for other purposes (e.g. cache invalidation, transitive allowlisting, etc.) then the associated subscriptions should also be removed.