Coding style cleanup for base::syslog::fragment, using the newer
method for handling defines that should take both source and content.

Remove base::kerberos filter-syslog rules.  These only had rules for
ksu, which we no longer use, so they're now pointless.

Add dependencies in base::postfix::recipient on the postfix package so
that the required directory structure will exist.

Change the handling of the use_syslog_conf variable in the
rsyslog.conf.erb template to allow the variable to be either a string
or a boolean.  This works around a problem with puppet's handling of
booleans in some situations.  (whm)

central syslog service, i.e. logsink.stanford.edu.

* Forward messages to central syslog server
* Change date format

* which cannot resolve to themselves.

Globally disable monlist in all the ntp.conf variations to protect
against use of monlist to launch UDP-based DoS attacks.  This was
probably already prevented by firewall rules, but may as well make
sure.

Lowercase the hostname when forming a Kerberos principal in the
out-of-date cron job.  Some Networking systems use .Stanford.EDU
in the official hostname.  (rra)

Ignore more buggy power limit notifications from new Dell hardware.
Several cases were missed in the previous change.  (rra)

Ignore buggy CPU core power limit notifications from new Dell
hardware in default Debian filter-syslog rules.