Description:
------------
cURL cannot upload files with filenames containing unicode characters.
5.6.38, 7.0.32: upload is successful
7.1.25, 7.2.13, 7.3.0: upload failed

Test script:
---------------
$test_file = sys_get_temp_dir() . DIRECTORY_SEPARATOR
    . '✄♚♛♜♞PHP' . PHP_VERSION . PHP_OS . '.txt';
file_put_contents($test_file, 'test') or exit('file_put_contents failed');
register_shutdown_function(function() use ($test_file) {
    unlink($test_file); 
});
$curl = curl_init('http://localhost/upload.php');
curl_setopt_array($curl, [
    CURLOPT_POST => TRUE,
    CURLOPT_SAFE_UPLOAD => TRUE,
    CURLOPT_POSTFIELDS => ['file' => curl_file_create($test_file)],
    CURLOPT_RETURNTRANSFER => TRUE,
    CURLOPT_HEADER => TRUE
]);
$got = curl_exec($curl);
var_dump($got, curl_error($curl), curl_getinfo($curl), PHP_VERSION);

----------------
upload.php:
---
var_dump($_FILES);



Expected result:
----------------
HTTP/1.1 200 OK
Date: Fri, 07 Dec 2018 13:40:12 GMT
Server: Apache
Vary: Accept-Encoding
Content-Length: 284
Content-Type: text/html; charset=utf-8

array(1) {
  ["file"]=>
  array(5) {
    ["name"]=>
    string(33) "✄♚♛♜♞PHP7.3.0WINNT.txt"
    ["type"]=>
    string(24) "application/octet-stream"
    ["tmp_name"]=>
    string(29) "D:\TMP\php8BF9.tmp"
    ["error"]=>
    int(0)
    ["size"]=>
    int(4)
  }
}