Shutdown Log of Ubuntu /var/log/syslog

Jan  3 10:10:34 thinktank kernel: Kernel logging (proc) stopped.
Jan  3 10:10:34 thinktank rsyslogd: [origin software="rsyslogd" swVersion="5.8.6" x-pid="508" x-info="http://www.rsyslog.com"] exiting on signal 15.
Jan  3 10:11:16 thinktank kernel: imklog 5.8.6, log source = /proc/kmsg started.