Description:
------------
When using the SoapClient you may sometime have this error :

SoapClient::__doRequest(): send of 776 bytes failed with errno=32 Broken pipe

The problem is that some servers that you're calling are closing the connection 
after some time. To fix this problem you need to use the "Connection: close" 
HTTP Header. The only way to do it currently is to use a stream_context with the 
1.0 HTTP protocol version :

$socket_context = stream_context_create(
       array('http' => array('protocol_version'  => 1.0))
);
$soapClient = new \SOAPClient($serviceUrl, array('stream_context' => 
$socket_context));

It would be nice to have a new option "keep_alive" that you can disable like 
this :

$soapClient = new \SOAPClient(ServiceUrl, array('keep_alive' => false));


Test script:
---------------
$soapClient = new \SOAPClient(ServiceUrl, array('keep_alive' => false));

Expected result:
----------------
Request with "Connection: close" header

Actual result:
--------------
Request with "Connection: Keep-alive" header