Preserve the address information about nodes in the cloud after a reconfigure

if any message comes through, and since we have states of cnodes in
the status threads we don't need to keep retrying to send the message of
cnodes in error if the slurmctld is down.

parameter to the bluegene.conf file, MaxBlockInError, which is a percentage
of a block that can be in an error state before future jobs are disallowed
to run on the block.

in the system.  cnode_err_bitmap is used to tell if there are cnodes in
an error state in the usable portion of the midplane.  cnode_usable_bitmap
is used to tell what part of the midplane is usable, typically used for
small blocks which only use a portion of a midplane.

picking cnodes for a step.

midplane that isn't the first midplane in the block.

for blocks and all other hardware, so we can sync correctly.

can access it.

hasty.

Cray - Fix for srun.pl parsing to avoid adding spaces between option and
argument (e.g. "-N2" parsed properly without changing to "-N 2").

Make sure that salloc and sbatch spawned programs get the correct
SLURM_NODE_ALIASES environment variable in the event that some nodes
need to be booted when the allocation is made and thus the node
addresses are not available until later.

Add the SLURM_NODE_ALIASES environment variable containing node name
and address pairs for resources in a job's allocation that come from
a cloud environment.

Cray: Add support for job reservations with node IDs that are not in
numeric order. Fix for Bugzilla #5.

Prevent an authorized user from accidentally changing job hold type
from UserHold to AdminHold

Prevent job hold by operator or account coordinator of his own job from
being an Administrator Hold rather than User Hold by default.

Prevent slurmctld crashing with divide by zero with a configuration of MaxMemPerCPU=0.