Consider updating overload-general timestamps
In order to determine if relays have recently or frequently experienced overload, we could patch check_descriptor_callback() to republish the descriptor if the overload-general timestamp was recently updated.
We would also need to patch router_differences_are_cosmetic(), so that dirauths decide to include this descriptor.
The upsides of doing this are that it lets us know if overload is recently and continuously happening, so that analysis like tpo/network-health/team#66 (comment 2773945) and sbws usage becomes easier.
The downsides of frequent update are giving an adversary an immediate feedback that a DoS attack is effective.
Edited by Georg Koppen