rgrep -l 'Copyright.*PostgreSQL Global Development Group' | while read FILE
do
	pipe sed 's/^\(.*Copyright (c) [12][0-9][0-9][0-9]-\)[12][0-9][0-9][0-9]\(, PostgreSQL Global Development Group.*\)$/\12006\2/' $FILE
done

echo "Manually update doc/src/sgml/legal.sgml too" 1>&2

