Description:
------------
When creating a user stream using the streamWrapper format, the $context variable is NOT set during the stream_open method call.


Reproduce code:
---------------
class TestStream {
	public $context;
	
	public function __construct() {
		/* do nothing */
	}
		
	public function stream_open($path, $mode, $options, &$opened_path) {
		echo "Open Context: ";
		var_dump($context);		
		
		return(true);
	}
}

stream_wrapper_register('test, 'TestStream', 0);

$options = array(
	'test' => array(
		'option1' => 'option1_value'));
	
$myContext = stream_context_create($options);

fopen('test://test', 'r', false, $myContext);


Expected result:
----------------
the $this->context variable should equal $myContext.

Actual result:
--------------
The $this->context variable is NULL.

Please NOTE the following:

1. The $context is set on an fread, however, it should be set during the fopen call.

2. If you look at the PHP-c-code, it appears that the userstream.c class is attempting to set the $context property just after class construction and prior to calling stream_open. Also, after modifying the C-code it appears that the context in the C-code is defined and calls the Zend add_property_resource function. However, there is clearly a bug somewhere as the property is still NULL.