value of cpus-per-task into account

the --mem-per-cpu is over the system limit then automatically set
the value for --cpus-per-task and divide the --mem-per-cpu by that
same factor

 accompanied r21335

    - Persistent option selections for each tab page
    - Clean up topology in grids
    - Leverage AllowGroups and Hidden options
    - Cascade full-info popups for ease of selection

   the exit code of the job script (or salloc) while derived_ec contains the
   highest exit code of all the job steps.
-- Added SLURM_JOB_EXIT_CODE and SLURM_JOB_DERIVED_EC variables to the
   EpilogSlurmctld environment

    job specifies it's memory requirement, then more CPUs than requested will
    automatically be allocated to a job to honor the MaxMemPerCPU parameter.

#ifdef CR_DEBUG   to
if (select_debug_flags & DEBUG_FLAG_CPU_BIND)
for more flexibility in logging

  rather than debug3() for most logging 

than CR_DEBUG set at build time

    to partitions configured with AllowGroups.

    to abort.

  a user code (not slurmd, which has the symbols)

    slurm_job_step_stat() from user commands.

    for job termination when slurmctld restarts or reconfigures.

    future that the backfill scheduler will look when considering jobs to start.
    The default value is one day. See "man slurm.conf" for details.