and fix warnings.

Conflicts:
	META
	NEWS
	src/common/slurm_protocol_util.c

Added boards_per_node, sockets_per_board, ntasks_per_node,
ntasks_per_board, ntasks_per_socket, ntasks_per_core, and nice.

It will be simpler for the slurmstepd to get the parameter
as needed (once). That way, we get current information rather
than needing to worry about slurmd getting reconfigured data.

Move the logic that determines stdin/out/err value out of scontrol
into an API that can be called by other commands (e.g. squeue and
sview).

The duplicate can be generated by prolog or epilog programs