feat: concurrent multiple pieces back source

[jim3ma]

Signed-off-by: Jim Ma [email protected]

Description

In some network environments, one tcp connection is limited to very low transfer speed like 2M/s.
Concurrent downloading is very useful for this scenario.

This PR make concurrent multiple pieces download configurable and disabled by default.

We need update documents after merged this PR.

Related Issue

Motivation and Context

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[codecov-commenter]

Codecov Report

Merging #1426 (d59168d) into main (2942808) will increase coverage by 0.42%.
The diff coverage is 56.54%.

@@            Coverage Diff             @@
##             main    #1426      +/-   ##
==========================================
+ Coverage   44.28%   44.71%   +0.42%     
==========================================
  Files         113      113              
  Lines       10198    10373     +175     
==========================================
+ Hits         4516     4638     +122     
- Misses       5230     5269      +39     
- Partials      452      466      +14     

Flag	Coverage Δ
Object-compatibility-e2etests	?
e2etests	?
unittests	44.71% <56.54%> (+0.42%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
client/config/peerhost.go	32.37% <ø> (ø)
client/daemon/daemon.go	5.28% <0.00%> (-0.02%)	⬇️
client/util/types.go	0.00% <ø> (ø)
internal/util/util.go	87.50% <ø> (ø)
.../source/clients/httpprotocol/http_source_client.go	48.92% <0.00%> (-11.26%)	⬇️
pkg/source/source_client.go	1.65% <0.00%> (-0.11%)	⬇️
client/daemon/peer/piece_manager.go	53.74% <68.83%> (+6.11%)	⬆️
client/daemon/peer/peertask_conductor.go	57.14% <100.00%> (ø)
client/daemon/peer/peertask_piecetask_poller.go	47.10% <100.00%> (+16.66%)	⬆️
... and 1 more

[gaius-qi]

LGTM

[gaius-qi]

LGTM