problem for the AIX build.

If srun is unable to communicate with the slurmd tasks are now marked as failed with the controller.

some failure conditions

to user root.

    assume control immediately. Patch from Matthieu Hautreux, CEA.

  out (as expected when trying to process all accounting records).

    job is in completing state (possible race condition with Moab).

  Same as IS_JOB_COMPLETED && JOB_COMPLETING flag is clear.

  see the error once).

    allocation properly when node names are configured out of sort order 
    with more than one numeric suffix (e.g. "tux10-1" is configured after 
    "tux5-1").