1. Continue to best-effort provide, but still return an error when we fail to
send provider records to the _best_ peers.
2. Continue returning the best peer's we've found in GetClosestPeers, but also
return an error to indicate that we didn't find the closest ones.
And fix the hang test.
Currently keys that get logged are casted from []byte. Which means that log output looks like this.
```
{"event":"getClosestPeersBegin","key":"\u0012 \ufffdᱡ\ufffd`\ufffdF]\ufffd\ufffdᠸCƶ\u0006E\ufffdrb\ufffd\ufffdO\ufffd\ufffdu\ufffd\ufffdj\u000b","system":"dht","time":"2017-07-27T11:12:08.51775836Z"}
```
after fix like this:
```
{"event":"getClosestPeersBegin","key":"QmQyyaB8znrakGydP3ynRsXre96Uw9wc6w6zuP61bbZuNj","system":"dht","time":"2017-07-27T11:16:30.693008112Z"}
```
First, we use Alpha instead of K as the number of peers we grab from the
routing table (as per the kademlia paper).
Second, we don't use a size limited set for the 'GetClosestPeers' query.
We're going to process more than K peers before we find the K closest
peers.
Third, Change GetClosestPeers to actually return the K Closest peers,
not a hodge podge of peers that it found on the way to finding the
closest peers.
* Update golog in go-ipfs
License: MIT
Signed-off-by: Jakub Sztandera <kubuxu@protonmail.ch>
* Update go-libp2p for go-log
License: MIT
Signed-off-by: Jakub Sztandera <kubuxu@protonmail.ch>
* Update go-libp2p-secio for go-log
License: MIT
Signed-off-by: Jakub Sztandera <kubuxu@protonmail.ch>
* Update go-libp2p-crypto for go-log
License: MIT
Signed-off-by: Jakub Sztandera <kubuxu@protonmail.ch>
* Update go-libp2p-peer for go-log
License: MIT
Signed-off-by: Jakub Sztandera <kubuxu@protonmail.ch>
* Import peersore, it wasn't imported
License: MIT
Signed-off-by: Jakub Sztandera <kubuxu@protonmail.ch>
* Update peerstore
License: MIT
Signed-off-by: Jakub Sztandera <kubuxu@protonmail.ch>
* Update peer
License: MIT
Signed-off-by: Jakub Sztandera <kubuxu@protonmail.ch>
* Update secio
License: MIT
Signed-off-by: Jakub Sztandera <kubuxu@protonmail.ch>
* Update go-libp2p
License: MIT
Signed-off-by: Jakub Sztandera <kubuxu@protonmail.ch>
For the rest of the packages in util, move them to thirdparty
and update the references. util is gone!
License: MIT
Signed-off-by: Jeromy <jeromyj@gmail.com>
