Support CURLOPT_ECH

Description

Not sure, if this is really a bug. It is more like a question if this is a bug

The following code:

<?php
$curl = curl_init('https://php.net');
curl_exec($curl);

$error = curl_getinfo($curl, CURLINFO_OS_ERRNO);
echo $error.' "'.curl_strerror($error).'"'.PHP_EOL;

curl_close($curl);

Resulted in this output (with cURL >=8.10):

101 "ECH attempted but failed"

But I expected this output instead (with cURL <8.10):

0 "No error"

Seems like a cURL issue and not an issue with the wrapper, but cURL provides the CURLOPT_ECH to configure it, which the PHP wrapper does not. So I am a bit stuck. Do I have to treat errors differently depending on the cURL version I use or is there any possibility to configure the behavior here?
The CURLOPT_ECH documentation (see above) says the default setting is off, which does not seem to be true here. Is this an issue with cURL or with the wrapper changing the default somehow?

PHP Version

PHP 8.3.12

Operating System

No response

Comienza con el manejo de las opciones de libcurl por parte del wrapper de PHP cURL y con la documentación de CURLOPT_ECH; después, reproduce el comportamiento indicado de CURLINFO_OS_ERRNO en las versiones de cURL especificadas. Determina si el wrapper puede exponer esta opción sin cambiar los valores predeterminados de libcurl. Se considera terminado cuando el comportamiento de ECH se puede configurar según lo solicitado y el comportamiento de error dependiente de la versión del issue está cubierto por pruebas adecuadas.