optimize curl_multi

[matyhtf]

No description provided.

[codecov]

Codecov Report

Merging #4105 (2a3ae40) into master (b9e8eb7) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4105      +/-   ##
==========================================
- Coverage   48.80%   48.77%   -0.03%     
==========================================
  Files          71       71              
  Lines       14269    14269              
==========================================
- Hits         6964     6960       -4     
- Misses       7305     7309       +4     

Impacted Files	Coverage Δ
src/network/client.cc	46.56% <0.00%> (-0.45%)	⬇️
src/server/port.cc	50.00% <0.00%> (-0.28%)	⬇️

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