Merge remote-tracking branch 'origin/master' into tres_limits

NEWS

auxdir/x_ac_cray.m4

configure

configure.ac

doc/html/burst_buffer.shtml

doc/man/man5/burst_buffer.conf.5

slurm.spec

slurm/slurm.h.in

src/api/burst_buffer_info.c

src/common/job_resources.c

src/common/layouts_mgr.c

src/common/slurm_protocol_defs.c

src/common/slurm_protocol_pack.c

src/layouts/Makefile.am

src/layouts/Makefile.in

src/layouts/power/Makefile.am

src/layouts/power/Makefile.in

src/layouts/power/cpufreq.c

src/layouts/power_cpufreq/Makefile.am

src/layouts/power_cpufreq/Makefile.in