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.

Get test code pair slurm_protocol_message_server.c and
slurm_protocol_message_client.c working.

#ifdef'ed out unused variable in controller if NOT --with-authd

task distribution).
Also added disclaimers and fixed a few typos.