Update apt-security-check

Added the --force-confdef (to make apt-get use the defailts) and --force-confold, to make apt-get use the conf file that we've changed when that's there.  You need to use both together.  See here - http://raphaelhertzog.com/2010/09/21/debian-conffile-configuration-file-managed-by-dpkg/
Merge pull request #16 from mattrm/master

Update apt-security-check