This object specifies whether this peer is the
preferred one over the others. By default, when
the value of this object is 'false', NTP chooses
the peer with which to synchronize the time on
the local system. If this object is set
to 'true', NTP will choose the corresponding
peer to synchronize the time with. If multiple
entries have this object set to 'true', NTP will
choose the first one to be set. This object is
a means to override the selection of the peer by
NTP.