Merge pull request #7506 from liewegas/wip-bluestore-block

osd: bluestore: set default wal size; improve weird implicit block file creation logic

Reviewed-by: Loic Dachary <ldachary@redhat.com>

diff --cc src/common/config_opts.h
Simple merge

diff --cc src/os/bluestore/BlueStore.cc
Simple merge