Additional network / webhook level event filtering

[Khaaz]

Additional webhook / network level event filtering

This feature is NOT mandatory for v3. This is a suggestion for future development of this project.
This would allow a lot of possibilities but would also adds a major level of complexity and needs a considerable amount of work.

Overview

Webhook or network level restriction for events.
This would mean filtering events at a better level than github / gitlab allows.
This could also be implemented webhook level to filter event levels within the same network.

Restriction

This is a particularly hard to implement feature and is definitely not a major point of planned release. This not being implemented wouldn't be an issue.
This would also mean adding a github parser to be able to filter correctly events.
This would also clutter config files.