Merge branch 'Verify_Bad_Hdr_Rand_Seed_Mult_Workload_Iterations_Non_Repeating_Seed...

* 'Verify_Bad_Hdr_Rand_Seed_Mult_Workload_Iterations_Non_Repeating_Seed' of https://github.com/horshack-dpreview/fio:
  Bad header rand_seed with time_based or loops with randrepeat=0 verify

diff --cc backend.c
Simple merge