Refactor native curl

[matyhtf]

No description provided.

[codecov]

Codecov Report

Merging #4113 (912aaca) into master (490ef86) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4113      +/-   ##
==========================================
+ Coverage   48.76%   48.78%   +0.02%     
==========================================
  Files          71       71              
  Lines       14269    14269              
==========================================
+ Hits         6958     6961       +3     
+ Misses       7311     7308       -3     

Impacted Files	Coverage Δ
src/network/client.cc	46.56% <0.00%> (-0.45%)	⬇️
src/server/port.cc	50.27% <0.00%> (+0.27%)	⬆️
src/os/async_thread.cc	68.85% <0.00%> (+0.87%)	⬆️
src/protocol/base.cc	63.15% <0.00%> (+1.97%)	⬆️

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