I renamed the function

  Turkish locale is used. This is because 'i' and 'I' isn't the same letter so

  strcasecmp() on those letters are different in Turkish than in English (or

  just about all other languages). I thus introduced a totally new internal

  function in libcurl (called Curl_ascii_equal) for doing case insentive

  function in libcurl (called Curl_raw_equal) for doing case insentive

  comparisons for english-(ascii?) style strings that thus will make "file"

  and "FILE" match even if the Turkish locale is selected.