Description of problem:
  authconfig tries to stop the nscd service when caching is disabled.  If nscd is not installed, then this produces an error/warning message:
  "error reading information on service nscd: No such file or directory"
Version-Release number of selected component (if applicable):
  authconfig-4.3.4-1

How reproducible:
  Always

Steps to Reproduce:
1. Execute without nscd installed
2. Leave the "Cache Information" box unchecked
3. Select "Next" and "okay"
    
Actual results:
  Error/warning message (see above)

Expected results:
  authconfig should hide this message.  It is only relevant when "Cache Information" is selected.