merged vnn map broadcast from ronnie

(This used to be ctdb commit c0fa029435fdaa0be006b28eddb6b31beb2ee605)

diff --cc ctdb/common/ctdb_control.c
Simple merge

diff --cc ctdb/common/ctdb_ltdb.c
Simple merge

diff --cc ctdb/common/ctdb_traverse.c
Simple merge

diff --cc ctdb/include/ctdb_private.h
Simple merge

diff --cc ctdb/tools/ctdb_control.c
Simple merge