max value in addiition to a min value

-- Removed remnant code for enforcing max sockets/cores/threads in the
   cons_res plugin.  This was responsible for a bug reported by Rod Schultz.

    set, then salloc can execute in the background. Otherwise a message will be
    printed and the job allocation halted until brought into the foreground.

    terminal's state.

Fix issue when updating database for clusters that were previously deleted before upgrade to 2.2 database.

    IDLE (in case the previous node state was DOWN).

    job is in a pending state, then send the request directly to the slurmctld
    daemon and do not attempt to send the request to slurmd daemons, which are
    not running the job anyway.

    consider the job's time limit when attempting to backfill schedule. The job
    will just be preempted as needed at any time.

    Priority.