Added full support for AIX checkpoint although more validation, fault-

NEWS

doc/man/Makefile.am

doc/man/man1/scontrol.1

doc/man/man3/slurm_checkpoint_error.3

doc/man/man3/slurm_checkpoint_restart.3

slurm/slurm.h.in

src/api/checkpoint.c

src/common/checkpoint.c

src/common/checkpoint.h

src/common/read_config.h

src/common/slurm_protocol_defs.c

src/common/slurm_protocol_defs.h

src/common/slurm_protocol_pack.c

src/plugins/checkpoint/aix/Makefile.am

src/plugins/checkpoint/aix/checkpoint_aix.c

src/plugins/checkpoint/none/checkpoint_none.c

src/scontrol/scontrol.c

src/slurmctld/proc_req.c

src/slurmctld/slurmctld.h

src/slurmctld/step_mgr.c