HTCONDOR-79: Address review comments for DISK knob docs
HTCONDOR-79: Address review comments for DISK knob docs

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