What is www.rsyslog.com for in shut-down and boot-up?
( xubuntu 12.04.01 64 bit......kernel = 3.2.0-31-generic )

Here is the recent last two lines from the system log before my system shuts down:
->  kernel: Kernel logging (proc) stopped.
->  rsyslogd: [origin software="rsyslogd" swVersion="5.8.6" x-pid="823" x-info="http://www.rsyslog.com"] exiting on signal 15.
and the recent first 5 lines at boot-up:

->  kernel: imklog 5.8.6, log source = /proc/kmsg started.
->  rsyslogd: [origin software="rsyslogd" swVersion="5.8.6" x-pid="702" x-info="http://www.rsyslog.com"] start
->  rsyslogd: rsyslogd's groupid changed to 103
->  rsyslogd: rsyslogd's userid changed to 101
->  rsyslogd-2039: Could not open output pipe '/dev/xconsole' [try http://www.rsyslog.com/e/2039 ]