1.Add CDATA to airvideo.cfg section of plug-in.  Was creating empty cfg file.
2.Removed echo/sleep statements from rc script. Not needed as no echo to progressframe takes place when using form action points to airvideoctl.php instead of /update.html
3.Account for blank password, pass to rc script as empty value as otherwise was shifting args up by one
4.Removed unused php function saveconfig from airvideoctl.php