/**
 * @package      hubzero-mw-session
 * @file         pixelflip/README
 * @author       Rick Kennell <kennell@purdue.edu>
 * @copyright    Copyright (c) 2005-2015 HUBzero Foundation, LLC.
 * @license      http://opensource.org/licenses/MIT MIT
 *
 * Copyright (c) 2005-2015 HUBzero Foundation, LLC.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * HUBzero is a registered trademark of HUBzero Foundation, LLC.
 *
 */

This program opens the default display and creates a 1x1 pixel window
at location (0,0).  It fills the window with white, then grey, then
it closes the window.  It waits five minutes and then it does it all
over again.

What's the point of this?  Subliminal messages in Morse Code?

The idea is to be able to continually update the screen---ever so
slightly---every five minutes so that Xvnc generates a packet or
two.  This will keep the session alive in the event that there's an
inactivity timer on an intermediate router.  It will also help out
in the event that the VNC viewer's machine crashes or is taken off
the network.  When that happens, unless the server generates packets
the connection is never closed and the middleware believes that
someone may still be viewing the session.  If packets generated
for the VNC connection are not answered by the client, the connection
will be terminated in 15 minutes.

