Format API host correctly when protocol is already present.

[rabbah]

Fixes #174.

[codecov]

Codecov Report

Merging #176 into master will decrease coverage by 0.01%.
The diff coverage is 83.33%.

@@            Coverage Diff             @@
##           master     #176      +/-   ##
==========================================
- Coverage   85.04%   85.03%   -0.02%     
==========================================
  Files          47       47              
  Lines        1826     1831       +5     
  Branches      378      379       +1     
==========================================
+ Hits         1553     1557       +4     
- Misses        273      274       +1

Impacted Files	Coverage Δ
info/index.js	81.73% <83.33%> (-0.09%)	⬇️

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