check_mk_agent should check for rsyslog proc running

deploying a branch with a rsyslog config error (error -2207) shows that rsyslog cannot get started:

root@rewcitestvpn1:/etc/check_mk/logwatch.d# /etc/init.d/rsyslog restart
Stopping enhanced syslogd: rsyslogd already stopped.
Starting enhanced syslogd: rsyslogdrsyslogd: run failed with error -2207 (see rsyslog.h or try http://www.rsyslog.com/e/2207 to learn what that number means)
 already started.
root@rewcitestvpn1:/etc/check_mk/logwatch.d# /etc/init.d/rsyslog status
rsyslogd is not running ... failed!

(from redmine: created on 2015-04-16)