Description:
------------
When using stream_socket_server with non blocking stream, there seems to have no way to write buffer to client. When the stream is in blocking mode, things start working again.

Test script:
---------------
<?php
$protocol = "ssl";
$ip = "127.0.0.1";
$port = 8000;
$context = stream_context_create();
$certificate = __DIR__."/certificate_concat.pem";
stream_context_set_option($context, 'ssl', 'local_cert', $certificate);
stream_context_set_option($context, 'ssl', 'verify_peer', false);
$server = stream_socket_server("$protocol://$ip:$port", $errno, $errstr, STREAM_SERVER_BIND|STREAM_SERVER_LISTEN, $context);
stream_set_blocking($server, 0); //when set to non blocking, ssl will not work, if set to blocking, things start working again
while(true)
{
  $client = stream_socket_accept($server);
  print "accepted " . stream_socket_get_name( $client, true) . "\n";
  if( $client )
  {
    fwrite($client, "hello");
  } else {
    print "error.\n";
  }
}