Merge pull request #13425 from dzafman/wip-15912

osd: various changes for preventing internal ENOSPC condition

Reviewed-by: Sage Weil <sage@redhat.com>

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

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

diff --cc src/os/filestore/FileJournal.h
Simple merge

diff --cc src/os/filestore/FileStore.cc
Simple merge

diff --cc src/osd/OSD.cc
Simple merge