Added WithDisablePathLengthFallback option (to fix issue #447)

[UladzimirTrehubenka]

See #447

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[codecov-io]

Codecov Report

Merging #855 into master will increase coverage by 0.03%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #855      +/-   ##
==========================================
+ Coverage   51.63%   51.67%   +0.03%     
==========================================
  Files          39       39              
  Lines        3788     3791       +3     
==========================================
+ Hits         1956     1959       +3     
  Misses       1647     1647              
  Partials      185      185

Impacted Files	Coverage Δ
runtime/mux.go	45.52% <100%> (+1.36%)	⬆️

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[achew22]

@UladzimirTrehubenka, this looks like a great way to fix it to me! Thanks so much for taking the time to investigate and fix the problem in a way that allows everyone to benefit. Looks like you need to do the CLA, and I'm going to give @johanbrandhorst a chance to look at it also, LGTM.

[johanbrandhorst]

Great work!

[johanbrandhorst]

@UladzimirTrehubenka good to go as soon as you've signed the CLA.

[googlebot]

CLAs look good, thanks!