Description of problem:
I think that when sssd searches for krb5.keytab, and doesn't find it,
for whatever reason can not read it, or can not find appropriate data
(exact host principal) it should at least emit some warning. 

Version-Release number of selected component (if applicable):
sssd-1.1.1-3.fc12.x86_64

How reproducible:
Any error in keytab file, including if it's missing, will trigger this behavior.

Steps to Reproduce:
1. Configure sssd to use FreeIPA as authentication server, but remove keytab file
2. Start sssd, it doesn't report any problems with keytab.
  
Actual results:
sssd doesn't work correcty and there is no indication why.

Expected results:
There should be indication in syslog.