Description:
------------
There was a change since 5.2.6 release that is causing feof() to block when testing a non-blocking socket for EOF.  It happens if the socket has no data waiting in its buffer and is open.

If I compare 5.2.6 and 5.2.7 code it looks like main/streams/streams.c:642:

        if (!stream->eof && PHP_STREAM_OPTION_RETURN_ERR ==
                        php_stream_set_option(stream, PHP_STREAM_OPTION_CHECK_LIVENESS,
                        -1, NULL)) {
                stream->eof = 1;
        }

In 5.2.6 php_stream_set_option is called with a value of 0, not -1.

Reproduce code:
---------------
<?
$errno = 0; $errstr = '';
$socket = stream_socket_client('tcp://127.0.0.1:80', $errno, $errstr, 5, STREAM_CLIENT_CONNECT|STREAM_CLIENT_ASYNC_CONNECT);
if (stream_set_blocking($socket, 0) === false) die('blah');
$state = $i = 1;
while (1) {
	$read = $write = $except = null;
	switch ($state) {
		case 1: $write = array($socket); break;
		case 2: $read = array($socket); break;
	}
	echo $i.':'.time().chr(10);
	if (stream_select($read, $write, $except, 0, 500000) > 0) {
		echo $i.':'.time().chr(10);
		if (feof($socket)) break;
		echo $i++.':'.time().chr(10);
		switch ($state) {
		case 1:
			fwrite($socket, 'GET /blog HTTP/1.0' . chr(13).chr(10).chr(13).chr(10));
			$state = 2; break;
		case 2:
			if (fread($socket, 8192)) echo 'ooo'.chr(10); break;
		}
	}
}
echo time().chr(10);
?>

Expected result:
----------------
1:0
1:0
1:0
2:0
2:0
2:0
ooo
3:0
3:0
0


Actual result:
--------------
1:0
1:0
1:5
2:5
2:5
2:5
ooo
3:5
3:5
5