Description of problem:
It would be useful for s-c-x to resolve xfs issues. In particular, if
the X server is configured to use XFS on the local machine, make sure
the xfs service is started by default and, additionally, start it if
it is not currently running.

Attempting to run s-c-x when xfs isn't running also presents some
rather unfriendly error messages.

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


How reproducible:
Always

Steps to Reproduce:
1.Turn off xfs
2.Run redhat-config-xfree86

Actual results:
redhat-config-xfree86 will fail with a confusing error message.

Expected results:
redhat-config-xfree86 should start the xfs service before going any
futher, and set the service to start by default.