add --last option
fix issue with history bloat
atomic update handling per update session
add options to ignore s-update and r-update
Mark updates as S-Update if only update is a score change/assignment
add unmuting all muted entries with -d -m off
ignore cves older than those subscribed to in nvdchannels.conf
add support for interactive marking of CVEs for manual muting
do not clobber muting history for entries which are already muted
use rh-affectedpackage info for package matching and excluding to improve detection rate