doc: update the copyright years that match $DEBFULLNAME

app: dpkg-copyright
--- var
my @l = localtime; $var{year} = $l[5]+1900;
$var{oldyear} = $var{year} - 1;
---

# $year can be overridden by command arguments
--- load
# add the new year
Files:~ Copyright=~"s/(\d+),?\s+$DEBFULLNAME/$1, $year, $DEBFULLNAME/g"
# create ranges with new year when needed
Files:~ Copyright=~"s/-$oldyear,\s*$year,?\s+$DEBFULLNAME/-$year, $DEBFULLNAME/g"
Files:~ Copyright=~"s/$oldyear,\s*$year,?\s+$DEBFULLNAME/$oldyear-$year, $DEBFULLNAME/g"
---

commit: updated copyright year of $DEBFULLNAME
