Clean up messages issued from sync-http-logs.py
    
    Previously, the script was very talkative by default. Make the default
    to be silent for log levels < WARNING and allow logging (at different
    level) to syslog. Additionally, configure the cronjob to log everything
    of levels >= INFO to syslog.
    
    Signed-off-by: Nils Philippsen <nils@redhat.com>