Do not try to convert line-endings to CRLF on Windows by setting stdout
to binary mode, just like the curl tool does if --ascii is not specified.
This should prevent corrupted stdout line-ending output like CRCRLF.
In order to make the previously naive text-aware tests work with
binary mode on Windows, text-mode is disabled for them if it is not
actually part of the test case and line-endings are corrected.
When CURLOPT_REFERER has been used, curl_easy_reset() did not properly
clear it.
Verified with the new test 598
Bug: http://curl.haxx.se/bug/view.cgi?id=3481551
Reported by: Michael Day
