Better handling of select plugins that don't exist on various systems for cross cluster communication.  Slurmctld, slurmd, and slurmstepd now only load the default select plugin as well.

Added preempt_mode option to qos.  Also added quite a bit of logic to add options for for new cpu_run_mins limits

    2.2.0.pre7.

   svn merge -r20596:20629 https://eris.llnl.gov/svn/slurm/branches/slurm-2.2.multi.partition

    triggers from working without the --enable-debug configure option.

   "sbatch --begin=uts458389988 my.script").

    srun/sbatch --hold/-H option or use "scontrol update jobid=# priority=0"
    to hold and "scontrol update jobid=# priority=1" to release).

    get purged before their trigger can be processed (e.g. MinJobAge=1).

    RLIMIT_STACK.

    job at submission time, but to attempt scheduling many jobs at once for
    improved performance under heavy load.

    than one port for improved scalability.

    reservations.

Fixed issue where if the slurmdbd was down past the MinJobAge and the start of the job hadn't been sent yet to throw it on the queue to be sent when the slurmdbd comes back up.