download versions

[http://dummy.us.eu.org/robert (Robert)]

apt-show-versions -u | grep ' upgradeable ' | sed -e 's, .*,,' |
  perl -l0 -ne print |
  xargs -0 aptitude -q -y -d --full-resolver -o Acquire::http::Dl-Limit=0 -o Dir::Etc::Preferences=/dev/null -o Aptitude::ProblemResolver::SolutionCost=safety,priority install >/tmp/cron.daily.robert-debsecan.downloaded 2>&1