changed slurm_send_recv_controller_rc_msg to handle all rm messages instead of just SLURM_RC_MESSAGE

slurm_send_recv_controller_msg() rather than use it's own 
logic. This provides much better support for the backup 
controller during the fail-over period.

to reduce logging load.

RPC) a parameter, effectively raise the time from 1 to 5 mins.

    tests, patch.1.2.0-pre11.070111.plane from Dan Palermo (HP).

    Communications now supported directly between appliciation tasks via
    Slurm's PMI library. Srun sends single message to one task on each node
    and that forwards key-pairs to other tasks on that nodes. Old code send
    key-pairs directly to each task.
    NOTE: PMI applications must re-link with this new library.

BLUEGENE - zero out values for freeing and freed blocks when a job is being added so they don't get too large.