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.

This change is to allow the v7 rsyslog template to be corrected
without changing the default rsyslog behavior.

* Forward messages to central syslog server
* Change date format

Add an apt preferences file to use the rsyslog version from
backports.  Remove preferences installation from the syslog
module.

* which cannot resolve to themselves.

Correct variable used to identified the syslog server to send output
to in base::syslog::fragment.

Update comment documentation in base::pam::workgroup.  Remove unused
parameter and variables.

The output templates can be ignored if they are not useful for a
specific configuration.  Most of them time they are useful and
releaves custom configurations from the responsibility of installing
the templates separately when they are needed.