(HTCONDOR-809)  Add comment about SpoolSpace not being under user control.
(HTCONDOR-809)  Add comment about SpoolSpace not being under user control.

htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor