In /etc/crontab, there is a commented-out call to /usr/bin/newsyslog.
Given the goal of making FreeBSD easy for people to setup (cf. new
install scripts), /usr/bin/newsyslog should be un-commented.
1) There is no such program as `newsyslog' in FreeBSD.
2) This functionality is handled differently by the daily/weekly/monthly
scripts (which arguably ought to use a log-rotation utility, but in
the absence of one aren't about to change).