Revert " Build urlURL using URLComponents"

[pushkarnk]

This reverts commit 46fbee0.

These commit has caused many regressions in Kitura tests. Most of the 124 failures are around percent encoding and queries. I was able to debug one of the issues:

_urlComponents?.path = _urlString isn't enough. We'd need the split the _urlString into path and query and take care of percent encoding.

This brings down the number of failures to 30. But it also cancels out any of the performance gains we saw with this change.

Because this commit has been tagged, I am reverting it and opening an issue to investigate further.

[codecov-io]

Codecov Report

Merging #153 into master will increase coverage by 0.15%.
The diff coverage is 70%.

@@            Coverage Diff             @@
##           master     #153      +/-   ##
==========================================
+ Coverage   66.56%   66.71%   +0.15%     
==========================================
  Files          20       20              
  Lines        1301     1298       -3     
==========================================
  Hits          866      866              
+ Misses        435      432       -3

Flag	Coverage Δ
#KituraNet	66.71% <70%> (+0.15%)	⬆️

Impacted Files	Coverage Δ
Sources/KituraNet/HTTP/HTTPServerRequest.swift	71.69% <70%> (+1.32%)	⬆️

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