Description:
------------
Hello,

we have found the following problem:

If you use the PHP SoapClient and the endpoint returns some cookies, the cookies get added to the subsequent requests, but there is an additional semicolon appended.

Example:
Cookie: testcookie1=true;testcookie2=true;

According to the RFC I've read this is not neccessary.


The problem is now that we are trying to consume a web service that unfortunately returns a "400 Bad Request" error because of this semicolon.

Test script with an other webservice is appended to see the cookie header in the request.

I have tried this with the lastest PHP versions of 7.0, 7.1 and 7.2 - same result.

Thank you!

Test script:
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$client = new SoapClient("http://ec.europa.eu/taxation_customs/vies/services/checkVatService?wsdl", array('trace' => true));
$client->__setCookie('testcookie1', 'true');
$client->__setCookie('testcookie2', 'true');

try {
	$response = $client->checkVat(array("countryCode" => 'TEST', "vatNumber" => 'TEST'));
} catch (Exception $e) {
	echo "Exception caught:\n" . $e . "\n";
}

$requestLoggingData = "Request:\n" . $client->__getLastRequestHeaders() . "\n\n" . $client->__getLastRequest() . "\n\n";
$requestLoggingData .= "Response:\n" . $client->__getLastResponseHeaders() . "\n\n" . $client->__getLastResponse() . "\n\n";
$requestLoggingData .= "Cookies:\n" . print_r($client->__getCookies(), true);
echo $requestLoggingData;

Expected result:
----------------
No semicolon is prepended in the cookie header.