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Move the job of splitting requests to its own package

As soon as peers appear, consume all of the want budget

Reduce duplicates through splits of requests

Order optimized peers by most recent to receive a block

Fix debug log formatting issues

Feat/bandwidth limited tests

Updated Libp2p and used it's newly exposed RateLimiter public interface

Limits connection bandwidth in real world benchmarks so that blocks are delayed if single peer is
overused

fix #40

make both performance benchmarks write to a tmp dir and put in the .gitignore

fix(tests): stabilize unreliable session tests

fix #43

gx publish 1.1.19

Bitswap Refactor #4: Extract session peer manager from sessions

Add a unit test for session package

Add unit test for sessionpeermanger and comment exported methods

Add a unit test and do some additional decoupling

extract the job of finding and managing peers for a session from the job of requesting blocks

Bitswap Refactor #3: Extract sessions to package

remove for loop not needed, cleanup spelling

- moved sessions out of main bitswap package
- modified session manager to manage all sessions
- moved get functions to their own package so sessions can directly

BREAKING CHANGE: SessionsForBlock, while not used outside of Bitswap, has been removed, and was an
exported function

docs(comments): end comment sentences to have full-stop

per https://github.com/golang/go/wiki/CodeReviewComments#comment-sentences

Bitswap Refactor #2: Extract PeerManager From Want Manager + Unit Test

Finishing adding comments to WantManager and PeerManager, refactor message structure for type
safety, add sending messages test

Seperates the functions of tracking wants from tracking peers
Unit tests for both peer manager and want manager
Refactor internals of both to address synchonization issues discovered
in tests

Bitswap Refactor #1: Session Manager & Extract Want Manager

Extract session manager from bitswap
Extract session manager & want manager to package
Move want manager message queue to seperate file
Move Message Queue to subpackage
Respond to PR Comments

fix(Receiver): Ignore unwanted blocks

feat(Benchmarks): Add real world dup blocks test

- add a delay generator that similates real world latencies one might encounter on the internet
- modify virtual network to accept different latencies for different
peers based on using NextWaitTime on passed delay
- modify dup_blocks_test subtestDistributeAndFetch to accept a custom
delay
- Add a real world benchmarks that simulates the kinds of problems one might
encounter bitswaping with a long lived session and a large swarm of
peers with real world latency distributions (that causes #8 not to
function well in practice)