Reprovide Sweep Implementation

[iand]

Prerequisites

#41 is required, because currently it is the IPFS implementations that must handle the reprovide. This optimization only works if the DHT manages the reprovides itself.

Description

The project is well described at DHT Reprovide Sweep. This change is a client change only, and is expected to have a significant impact, especially on large content providers.

Now the Minimal Working Modular DHT is finished, all the logic of Reprovide Sweep can be encapsulated inside the Provide module.

References

• DHT Reprovide Sweep

[iand]

See libp2p/go-libp2p-kad-dht#824 for important comments