periodic/410.pkg-audit.in: make output non-quiet (fix #712)

Make security script output non-quiet, making it consistent with portaudit and itself when database is not updated during this run.
Merge branch 'master' of github.com:coctic/pkg into coctic-master
Merge branch 'master' into coctic-master
Add $daily_status_security_pkgaudit_quiet to control verboseness of
output.  Default YES produces shortform output: just a list of
vulnerable packages.