Fix: Make `domain` and `whiteList`, `protocalWhiteList` in the same lower case

[ghost]

Change Logs:

1) securities.js：Add convert whiteList and protocalWhiteList to the lowerCase() in union. 2) context.js: Remove undefined condition, because this has been done in securities.js. 3) surl.js: Make the header in the same lowerCase(). 4) hsts.js: Remove the comment's 1st line's empty space at the end (auto fixed by eslint). 5) utils.test.js: Change comments by fixing typos. 6) test\fixtures\apps\isSafeDomain\app\router.js: Add more unit tests to test with. 7) test\fixtures\apps\isSafeDomain\config\config.js: Add more domainWhiteList items for testing.

[ghost]

/cc：@dead-horse。This will fix the rest problem when your domain doesn't match domain_white_list. So as for protocalWhiteList (make them in lowerCase() in union).

Thanks for your time of reviewing!

[codecov[bot]]

Codecov Report

Merging #44 into master will increase coverage by <.01%. The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #44      +/-   ##
==========================================
+ Coverage   95.86%   95.87%   +<.01%     
==========================================
  Files          30       30              
  Lines         484      485       +1     
==========================================
+ Hits          464      465       +1     
  Misses         20       20

Impacted Files	Coverage Δ
lib/middlewares/hsts.js	100% <ø> (ø)	:arrow_up:
lib/helper/surl.js	92.3% <100%> (-2.94%)	:arrow_down:
app/middleware/securities.js	95.23% <100%> (+1.29%)	:arrow_up:
app/extend/context.js	100% <100%> (ø)	:arrow_up:

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[ghost]

@dead-horse : All is fixed.

[dead-horse]

LGTM

[ghost]

Thanks anyway!