Merge pull request #1883 from ceph/wip-msgr

messenger refactoring for xio

Reviewed-by: Greg Farnum <greg@inktank.com>

diff --cc src/mds/MDCache.cc
Simple merge

diff --cc src/mds/MDS.cc
Simple merge

diff --cc src/mon/MDSMonitor.cc
Simple merge

diff --cc src/mon/OSDMonitor.cc
Simple merge

diff --cc src/mon/PGMonitor.cc
Simple merge

diff --cc src/msg/SimpleMessenger.cc
Simple merge

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

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