This was only missing because our mirror script didn't know about
it.  That's now been fixed, so add wheezy-updates back into the
default sources.list for wheezy.

Remove some comments that don't make sense in the generated file.

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.