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This reverts commit c9851849.

This reverts commit df4f28c3.

Ongoing work is being done in feat/dht-hardening-0.7 and this change isn't quite ready.

* Peer Diversity in the DHT

* Bootstrap when RT is empty and optimize allocations.
Co-authored-by: Steven Allen <steven@stebalien.com>

Bumps [github.com/ipfs/go-log](https://github.com/ipfs/go-log) from 1.0.3 to 1.0.4.
- [Release notes](https://github.com/ipfs/go-log/releases)
- [Commits](https://github.com/ipfs/go-log/compare/v1.0.3...v1.0.4)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

These are all critical paths so we should try to do as little work as possible.

Bumps [github.com/libp2p/go-libp2p](https://github.com/libp2p/go-libp2p) from 0.8.0 to 0.8.1.
- [Release notes](https://github.com/libp2p/go-libp2p/releases)
- [Changelog](https://github.com/libp2p/go-libp2p/blob/master/NEWS.md)
- [Commits](https://github.com/libp2p/go-libp2p/compare/v0.8.0...v0.8.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

After profiling allocations on a bootstrap node, I've noticed that
peerInfoToPBPeer is a very heavy source of allocations. This change should
improve the situation significantly.

Bumps [github.com/libp2p/go-libp2p](https://github.com/libp2p/go-libp2p) from 0.7.4 to 0.8.0.
- [Release notes](https://github.com/libp2p/go-libp2p/releases)
- [Changelog](https://github.com/libp2p/go-libp2p/blob/master/NEWS.md)
- [Commits](https://github.com/libp2p/go-libp2p/compare/v0.7.4...v0.8.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/libp2p/go-libp2p-routing-helpers](https://github.com/libp2p/go-libp2p-routing-helpers) from 0.2.0 to 0.2.1.
- [Release notes](https://github.com/libp2p/go-libp2p-routing-helpers/releases)
- [Commits](https://github.com/libp2p/go-libp2p-routing-helpers/compare/v0.2.0...v0.2.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Unfortunately, constructing a router is _not_ cheap. Cache it so we don't have
to re-compute it every time we get a query.

* fix Low Peers and Cleanup

* new RT management policy

* Add Kademlia async lookup implementation (replaces prior implementation)
* Add lookup events that allow full lookup reconstruction from logs
* Introduce lookup stopping condition, based on parameter "beta"
Co-authored-by: Adin Schmahmann <adin.schmahmann@gmail.com>

Allows specifying peer filter functions on query and on adding peers to the routing table. This patch also includes some reasonable default functions for a public-only and private-only DHT.
Co-authored-by: Will Scott <will@cypherpunk.email>
Co-authored-by: Steven Allen <steven@stebalien.com>

fix(test): TestFindPeerQuery and TestFindPeerQueryMinimal now refresh DHT routing tables before running. TestFindPeerQuery no longer runs with the race detector because it uses too many goroutines.

* feat: consume identify events to evaluate routing table addition
* fix: routing table no longer gets an update just because new messages have arrived or been sent
* fix: add already connected peers into the routing table before listening to events
Co-authored-by: Raúl Kripalani <raul.kripalani@gmail.com>
Co-authored-by: Aarsh Shah <aarshkshah1992@gmail.com>

go 1.14 is now required anyways