Update upgrade documentation
Backfill logging

Log not only the count of jobs tested since the last time locks
were released, but also the total job count since the backfill
scheduler started.
Add DebugFlag of BackfillMap

Add DebugFlag of BackfillMap. Previously a DebugFlag value of Backfill
logged information about what it was doing plus a map of expected resouce
use in the future. Now that very verbose resource use map is only logged
with a DebugFlag value of BackfillMap
Add DebugFlag BackfillMap document

Update slurm.conf man page for DebugFlag BackfillMap. This should be
considered part of commit 3c2bffb6eccc577283e7c8dc5a171d55dc45ca7d
backfill improvements

Improved logging of backfill scheduling actions
Better handling of backfill_resolution logic to avoid creating
   some records that are not needed
Avoid creating some backfill scheduling maps with zero duration
The net effect should be slightly improved performance with no
   significant difference in action
Format improvements

No change in logic
backfill - improve resource map build

This change prevents creation of some back-to-back records with
the same resources, but different times.
backfill - continue after failed job start

When a decision is made to start a job, if for some
reason that job's start failed, the backfill scheduler
would previously just exit. With this change, it logs
the event and reserves the resources expected to be
used and continues down the job queue.
backfill logging improvement
Fix slurmstepd core dump.
backfill map build fix

Previous logic was sometimes building incomplete map
Updates to NEWS for v14.03.4
Merge branch 'slurm-14.03'