pub unsafe extern "C" fn curl_formadd(
httppost: *mut *mut curl_httppost,
last_post: *mut *mut curl_httppost,
...
) -> CURLFORMcode
pub unsafe extern "C" fn curl_formadd(
httppost: *mut *mut curl_httppost,
last_post: *mut *mut curl_httppost,
...
) -> CURLFORMcode