Suddenly "shutdown -p now" produces a reboot

[Leslie Jensen]

I have a Server with Squid, 7.0-RELEASE-p4 FreeBSD, squid-3.0.11, that 
has been running fine for the last six months, at least.

It is shutdown every night at 7 PM via cron.

Now suddenly the machine is rebooting instead, and I've made no changes 
whatsoever. I'm wondering if this is a symptom of a coming hardware 
failure or if I can do something to get the normal behaviour back.

I did have a similar problem when I first put the machine into 
production, then it was clear from /var/log/messages that squid did not 
have enough time to shutdown and I solved it by changeing the parameter
rcshutdown_timeout="90" i rc.conf.

Here's a piece of /var/log/messages


----------- snip ------------
Jan  1 19:05:00 server01 shutdown: power-down by root:
Jan  1 19:05:33 server01 squid[823]: Squid Parent: child process 826 
exited with status 0
Jan  1 19:05:34 server01 named[718]: stopping command channel on 
127.0.0.1#953
Jan  1 19:05:34 server01 named[718]: stopping command channel on ::1#953
Jan  1 19:05:34 server01 named[718]: exiting
Jan  1 19:05:36 server01 syslogd: exiting on signal 15
Jan  1 19:07:29 server01 syslogd: kernel boot file is /boot/kernel/kernel
Jan  1 19:07:29 server01 kernel: Copyright (c) 1992-2008 The FreeBSD 
Project.
Jan  1 19:07:29 server01 kernel: Copyright (c) 1979, 1980, 1983, 1986, 
1988, 1
989, 1991, 1992, 1993, 1994
Jan  1 19:07:29 server01 kernel: The Regents of the University of 
California.
All rights reserved.

----------- snip ------------


Thanks

/Leslie