Conflicts:
	META
	NEWS

This patch adds logic to work around advanced reservations better.

Change node_req field in struct job_resources from 8 to 32 bits so we can
run more than 256 jobs per node.

correctly as of IBM driver V1R1M1 efix 008.

Conflicts:
	src/common/read_config.c

configured correctly.

switch/nrt: un/pack job request for PMD use

switch/nrt: pass launch_state info to PMD

Specifically if memory allocations are not tracked, this code could
prevent jobs from running due to lack of memory.

Move code to handle multiple clusters.  Previous code could have issues
where job_db_inx space could overlap.

current or in the past.

from Mark Nelson

Using the syscalls directly rather than calling bin/(u)mount via
system() avoids a few fork + exec calls, and provides better error
handling if something goes wrong.

Users of this functionality are also updated to use slurm_strerror in
order to provide a more informative error message.

The mount and umount syscalls are Linux-specific, but so are cgroups
so no portability is lost.