to use.

and NodeAddr. These represent the network addresses for ControlMachine,
BackupController, and NodeName records respectively.

for various values of cpus_per_task.

   (file descriptor manipulation routines)
 o added mutex utility macros to macros.h

for some calls to indicate all jobs).

Better deal with node state if slurmd registers with unrecognized jobs.

Greatly increase error checking on slurmctld reload of checkpoint data.