Don't spam ProcLog with errors if blkio.io_wait_time doesn't exist HTCONDOR-49
Don't spam ProcLog with errors if blkio.io_wait_time doesn't exist HTCONDOR-49

There is no kernel support for this when the bfq io scheduler is
enabled, which is the default on many newer systems.

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