* Windows - Add common util for web requests
* Use different method of retrieving options from module arg spec
* Added proper version_added for module options
* Fix linting errors
* Fix proxy issues and updated cred docs
* Fix FTP usage with proxy settings
* Removed uneeded function added in bad rebase
* Fix up client certificate auth
* fix new sanity checks
* Edit http agent code and update porting guide
* uri/win_uri: Make method a free text field
Since various interfaces introduce their own HTTP method (e.g. like
PROPFIND, LIST or TRACE) it's better to leave this up to the user.
* Fix HTTP method check in module_utils urls
* Add integration test for method UNKNOWN
* Clarify the change as requested during review
