Added ability to query batch step with sstat.  Currently no accounting data is stored for the batch step, but the internals are inplace if we decide to do that in the future.

   database's job record.

Fixed regression in pre12 in crypto/munge when running with --enable-multiple-slurmd which would cause the slurmd's to core.

select/cray: remove forward declarations

This removes forward declarations by reordering the function definitions.

select: make argument of select_p_select_jobinfo_alloc() consistent

This explicitly declares the argument list of select_p_select_jobinfo_alloc()
to be 'void', to avoid misinterpreting it as an old-style definition:
 * node_select.h already defines select_g_select_jobinfo_alloc(void);
 * the cons_res variant erroneously specified 'select_jobinfo_t *jobinfo';
 * explicit argument list makes bug tracking easier.

There were quite a few changes due to slurm changes from pre11 to pre12
and i also removed some void** function arguments.

select/cray: share the select_ops symbol table

This removes code duplication from the select/cray plugin, by 
 * sharing the (almost completely identical) declaration of the select_opts struct;
 * and also the slurm_select_context_t struct;
 * moving typedefs from .c into .h;
 * adjusting header-includes and renaming as required.

Further changes:
 * added the missing 'plugin_id' to the symbol list in other_select.c (otherwise
   the symbols would be shifted, causing segfault);
 * __select_jobinfo_t_defined is already set in slurm.h(.in), hence no longer
   repeated in node_select.h;
 * removed unused forward declarations to destroy the context.