If you want to have the demo instance be useable on any interface except
locahost/loopback the directions say to:

  Demo tracker is set up to be accessed by localhost browser.  If you
  run demo on a server host, please stop the demo, open file
  "./demo/config.ini" with your editor, change the host name in the "web"
  option in section "[tracker]", save the file, then re-run the demo
  program. If you want to change backend types, you must use "nuke".

except this doesn't work. demo.py calls roundup-server but doesn't pass
the parsed hostname.

The fix is to add '-n', hostname to the sys.argv. Patch attached.