[Uqjau-announce] eliminate 1 fork in getopts sections

[uqjau-announce]

This update triggered by suggestion from
  Chris F.A. Johnson, author           <http://shell.cfajohnson.com/>

Did a 'perl -i' style edit on a fairly long list of scripts, that had
a line related to getopts, like:

  shift $(expr $OPTIND - 1)
  
Chris points out that forking to run expr for integer math has
been unneeded for years.  The code was old, so I was "too used to
it, to see it was outdated"- thanks Chris.

The updated lines look like:

  shift $(( $OPTIND -1 ))

The update is in the usual location:

  http://download.savannah.gnu.org/releases/uqjau