case ${ACTION} in
pre)
	# clean up certificates
	_backup=$(mktemp)
	mv etc/ca-certificates.conf ${_backup}
	echo > etc/ca-certificates.conf
	usr/sbin/update-ca-certificates --fresh >/dev/null 2>&1
	mv ${_backup} etc/ca-certificates.conf
	;;
post)
	[ -s etc/ssl/certs/ca-certificates.crt ] || \
		rm -f etc/ssl/certs/ca-certificates.crt
	;;
esac