Add link to Lua hostlist module in download web page
Fix times on suspended job requeue

The previous changes in commit bc3d88282bc25d802a17b67d35183573d9899bd3
failed to address some accounting issues addressed here.
If FastSchedule=0 just log low mem or disk

Do not mark the node DOWN if its memory or tmp disk space is lower
than configured, just log it using debug message type
Remove vestigial note.
Merge remote-tracking branch 'origin/slurm-2.6'

Conflicts:
	src/slurmctld/node_scheduler.c