Update slurm.conf man page.
Affinity tests to support larger systems

Change the integer to hex function to support 32-bit unsigned
integers and exit on systems with more than 32 cpus per node
since Expect can not work with numbers so large.
slurmd to cache launched job IDs

Modify slurmd to keep track of which jobs have already been launched.
It the launch is complete, then process suspend requests immediately.
Previously the suspend request was always delayed by 1 second, which
adversely impacts gang scheduling performance. If the job can't be
found (say after a slurmd restart), then delay the suspend by up
to 3 seconds, but only once.