Add extra break to avoid TRY_LATER loop running too long.
better handling of different sleep times in backfill for sdiag
Better debug levels for sdiag request
Fix for if systems don't have blcr installed
Network file systems, at least Lustre, can return -1 and set errno
to EINTR when something wrong happened between the open call and
its return. By ensuring that Slurm retries on such errors, we can
better tolerate Network file systems errors at launch time.
Introduce counter to reduce possiblity of infinite loop