Implement following redirects over `fetch` supporting cookies.
`node-fetch` does not support sending cookies during redirect. However,
this is needed to not end-up in a redirect loop for a sign-in callback.
Fix integration tests failing due to redirects and 403 errors:
- Many redirects from `answers.microsoft.com` was throwing: throwing
`FetchError: maximum redirect reached` error. It was caused by not
having cookies when following redirects therefore having an infinite
sign-in callback for the webpage.
- Fixes integration tests failing due to additional referer header being
sent by the application. It adds support for making exceptions to
additional header sending through a list of regexes.
Add in-depth documentation for URL status checking.
