Added --with-alps-emulation to configure, and also an optional cray.conf to setup alps location and database information.

             child process, to avoid interactions with network
             sockets and file descriptors in use by the slurmctld.

            perform admissibility checks when e.g. moving a pending job into a restricted
            partition to which the user has access).

            correspondence with Ben - to me this now looks much similar to the way the
            SGI pagg IDs are used on Cray:
            * upper part = node_id       (corresponding to alloc_node)
            * lower part = 32 bit job ID (corresponding to alloc_sid)

            of patches #17 and #18.

            meant to pass the signal on to the plugin, along with the job_ptr, so that
            the plugin can take signal-dependent actions. In the case of select/cray 
            this is to forward the signal to the remote aprun invocations using apkill
            (implemented in subsequent patch #20).

            separates (a) signalling job steps from (b) cleaning up reservations.
            The former is used by subsequent patches for a better job_signal() on Cray.

If ALPS directory is explicitly set, then assume it's a Cray system.

better error handling, we need to make sure we add blocks to the list before starting the real time server or we could miss things on start up

BLUEGENE - fixed bug where the usage of a node could get the incorrect usage when adding it from another node when only using it for passthrough

to use select_g_job_expand_allow() instead

 -- Add support for jobs to expand in size. Submit additional batch job with
    the option "--dependency=expand:<jobid>". See web page "faq.html#job_size"
    for details. Restrictions to be removed in the future.

extern bool select_p_job_expand_allow(void);
Now only true for select/linear

BLUEGENE - fixed some issues where the bgq world wasn't always circular.  You can't readily make a mesh that wraps around the horn yet, but the logic is better to handle that case.  We need to make it so we look for a less amount of passthroughs to make things better there.

re-arrange some job_update code so that a job's required nodes and partition can both be changed in a 
single RPC. The previous code modified the partition first and reported an error if the orignal required
nodes were not in the new partition.

    was previously disabled since Moab stored the QOS within the Comment field.