# arg 1:  the new package version
# arg 2:  the old package version

post_upgrade() {
  if [ "$(vercmp $2 2.1.3-3)" -lt 0 -a -e /etc/syslog-ng.conf.pacnew ]; then
    echo "Attention syslog-ng update:"
    echo "Configuration file syntax has changed. Make sure to update /etc/syslog-ng.conf"

  fi
}

op=$1
shift
$op $*