/usr/src/etc/login.conf has an entry for datasize-curr which I
believe is a no-op.
Another problem with the "news" entry is the filesize. I
suspect this it's a big mistake to limit the filesize. For
example, the history file on my freebsd netnews system is 290
MB which is larger the 120 MB found in login.conf...
% more /usr/src/etc/login.conf
Already fixed in both the -current and -stable branches.