Correctly restore HTTP protocol on doing a request

[9seconds]

This potentially fixed #23

[codecov-commenter]

Codecov Report

Merging #24 (fc89ea6) into master (f01fdd3) will decrease coverage by 0.09%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #24      +/-   ##
==========================================
- Coverage   82.43%   82.33%   -0.10%     
==========================================
  Files          48       48              
  Lines        1429     1438       +9     
==========================================
+ Hits         1178     1184       +6     
- Misses        192      194       +2     
- Partials       59       60       +1     

Impacted Files	Coverage Δ
headers/wrappers.go	79.48% <100.00%> (+6.15%)	⬆️
layers/ctx.go	88.65% <0.00%> (-3.10%)	⬇️

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