bug(sockets): socket erros during relocation

[rustatian]

Reason for This PR

• closes: [🐛 BUG]: Socket errors during workers restarting roadrunner#1008

Description of Changes

• Return the correct relay pointer from the sync.Map.

License Acceptance

By submitting this pull request, I confirm that my contribution is made under
the terms of the MIT license.

PR Checklist

[Author TODO: Meet these criteria.]
[Reviewer TODO: Verify that these criteria are met. Request changes if not]

• All commits in this PR are signed (git commit -s).
• The reason for this PR is clearly provided (issue no. or explanation).
• The description of changes is clear and encompassing.
• Any required documentation changes (code and docs) are included in this PR.
• Any user-facing changes are mentioned in CHANGELOG.md.
• All added/changed functionality is tested.

[codecov]

Codecov Report

Merging #9 (5ef135f) into master (5629950) will increase coverage by 1.48%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master       #9      +/-   ##
==========================================
+ Coverage   78.10%   79.59%   +1.48%     
==========================================
  Files          20       21       +1     
  Lines        1754     1720      -34     
==========================================
- Hits         1370     1369       -1     
+ Misses        329      296      -33     
  Partials       55       55              

Impacted Files	Coverage Δ
pool/options.go	100.00% <ø> (+33.33%)	⬆️
ipc/socket/socket_factory.go	77.53% <100.00%> (-1.34%)	⬇️
pool/allocator.go	100.00% <100.00%> (ø)
pool/static_pool.go	66.81% <100.00%> (+3.14%)	⬆️
worker/state.go	84.21% <0.00%> (+5.26%)	⬆️

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