Fix struct names and don't use struct tags for consistency

[sergio-nsk]

No description provided.

[codecov]

Codecov Report

Merging #6 (d187304) into master (713cb96) will increase coverage by 1.45%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master       #6      +/-   ##
==========================================
+ Coverage   52.71%   54.17%   +1.45%     
==========================================
  Files          53       53              
  Lines        4340     4489     +149     
  Branches     1018     1069      +51     
==========================================
+ Hits         2288     2432     +144     
- Misses       1424     1426       +2     
- Partials      628      631       +3     

Flag	Coverage Δ
macos	57.46% <ø> (+1.56%)	⬆️
ubuntu	44.58% <ø> (+1.35%)	⬆️
ubuntu_curl	44.73% <ø> (+1.35%)	⬆️
windows	55.56% <ø> (+0.89%)	⬆️

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Impacted Files	Coverage Δ
resolver_mac.c	67.05% <ø> (+1.32%)	⬆️
resolver_win8.c	54.41% <ø> (ø)
resolver_winxp.c	0.00% <ø> (ø)
wpad_dhcp_posix.c	68.00% <0.00%> (+1.59%)	⬆️
threadpool_winxp.c	83.41% <0.00%> (+3.41%)	⬆️
threadpool_pthread.c	89.32% <0.00%> (+7.94%)	⬆️

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