List of change types

The possible types of changes are:
keyword parameters comments
newgroup newsgroup-name moderation-status [submission-email request-email] This is for newly-created groups only. The newgroup change exists at most once for any newsgroup and is not duplicated for booster newgroups or any other reason. moderation-status is 'm' for moderated, 'y' for unmoderated (yes, it's confusing).
rmgroup newsgroup-name  
moderate newsgroup-name submission-email request-email  
unmoderate newsgroup-name