Purely cosmetic changes to match coding standard
Defer sending SIGKILL signal to processes while core dump in progress.

Processes which can be signalled will be. Others will be signalled
when possible from a pthread.
NRT - fix typo
slurmdbd - Allow job derived ec and comments to be modified by non-root
users.
Minor formatting fixes
Add small security fix for those not running with the DBD
Fix issue with job name being truncated to 24 chars when sending a mail
message.
Merge remote-tracking branch 'origin/slurm-2.6'
Merge branch 'master' of https://github.com/cray-software/slurm

Merging in David's changes, most notably the OBS changes.