Auto-Cleanup DB

[jbspeakr]

Current Behaviour

Revocation stores data following a more or less sophisticated "bucket algorithm". However, data is never removed from DB which eventually not just results in a filling up DB but also in increased resource usage on all levels.

Expected Behaviour

There is no outdated data stored. This could get achieved by using e.g. TTLs on DB-level or some cleanup worker. This could also help getting rid of that "bucket algorithm" and its arbitrary maxTimeDelta.