+ Any PING seen from a master forces an election (rather than just
where basetime is zero).
+ A slave which receives a LASTSEEN message (presumably a restarted
master) sends back new message type, C_MASTER which indicates the
address of the current master.
+ Any PING seen from a master forces an election (rather than just
where basetime is zero).
+ A slave which receives a LASTSEEN message (presumably a restarted
master) sends back new message type, C_MASTER which indicates the
address of the current master.