lock, except for for comments

Previously, locking a section would prevent members to post articles and to comment to existing articles. With the 7.3 release a new policy has been implemented, by which locking only prevent the addition of new items. When a section is locked, a regular member cannot post a new article in it, but he can comment pages posted by others. To prevent commenting articles, you can either use the option no_comments at the section level, or lock articles individually.