Merge branch 'develop' into mongodb-3.4

bench/wtperf/config.c

bench/wtperf/config_opt.h

bench/wtperf/doxy.c

bench/wtperf/idle_table_cycle.c

bench/wtperf/misc.c

bench/wtperf/track.c

bench/wtperf/wtperf.c

bench/wtperf/wtperf.h

bench/wtperf/wtperf_opt.i

bench/wtperf/wtperf_throttle.c

bench/wtperf/wtperf_truncate.c

build_posix/configure.ac.in

dist/api_data.py

dist/filelist

dist/s_docs

dist/s_string.ok

dist/s_style

dist/stat_data.py

dist/wtperf_config.py

src/async/async_worker.c