Fix comment typos.

to use.
Srun to use slurm_addr's from allocate RPC except in the event of no allocation
(-Z option), where it generates slurm_addr's itself.

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.