error: ssh_msg_send: write appears to be from a network connection
error.  It was logged on git.stanford.edu.  I don't think we care
about it.

The new version of remctld changes some of the logged error messages.
Update the filter-syslog rules accordingly.

cherry-picked from the master branch by adamhl

This is the (old) master branch along with the fixes to the
cron file permissions that Russ made.