More HTTP_X_FORWARDED_PROTO header work

https://github.com/opencart-ce/opencart-ce/commit/36260c439ee624bb1a9d77cc3e5f9a23a1bd3853#commitcomment-3924059
Revert "More HTTP_X_FORWARDED_PROTO header work"

This reverts commit 30ff6ac548bf11a1f204668c217286352d505afa.
Much simpler HTTP_X_FORWARDED_PROTO header fix

Also set Paypoint and Worldpay to be more consistent/inclusive when
checking for HTTPS
Authorize.net server response parsing issue

https://github.com/opencart/opencart/issues/814