Description of problem:

With mysql not installed:

# chkconfig mysql
chkconfig version 1.3.20 - Copyright (C) 1997-2000 Red Hat, Inc.
This may be freely redistributed under the terms of the GNU Public License.

usage:   chkconfig --list [name]
         chkconfig --add <name>
         chkconfig --del <name>
         chkconfig [--level <levels>] <name> <on|off|reset>

Before this would be silent.  This causes problems with my cfengine scripts
where I run chkconfig on many systems that may or may not have certain services
installed.  At the very least, a quiet option would be useful.  I can redirect
stderr, but this will loose any real errors (whatever they might be?).

Version-Release number of selected component (if applicable):
chkconfig-1.3.20-1

How reproducible:
everytime

Steps to Reproduce:
1. Run chkconfig with unknown service
  
Actual results:
usage output

Expected results:
no output