Changes for move to Netlify (#4464)

* disable jekyll-redirect-from gem

* add _redirects file

* disable 404 redirect script

* add 301 redirect to test

* retain _redirects file

* Convert redirect_from's to _redirect file. (#4409)

* Remove redirect_from's. (#4424)

* Add 301's to _redirects. (#4427)

* add whitespace before 301

* move redirects in /js/redirects/js to _redirects

* add disabled option for cn redirect

* convert include to array in _config.yml

* enable redirects.js script for legacy support

_config.yml

@@ -32,11 +32,14 @@ defaults:
 permalink: pretty
 
 gems:
-  - jekyll-redirect-from
   - jekyll-feed
   - jekyll-sitemap
   - jekyll-seo-tag
   - jekyll-include-cache
+# disabled gems
+#  - jekyll-redirect-from
+
+include: [_redirects]
 
 # SEO
 logo: /images/favicon.png