Merge pull request #9456 from ukernel/wip-msg-seq

msg: don't truncate message sequence to 32-bits

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

diff --cc src/msg/Message.h
Simple merge

diff --cc src/msg/async/AsyncConnection.h
Simple merge