This event is sent periodically with the webbricks current time in it and can be used as a watchdog of webbricks and
used to reset the time of a webbrick if it drifts from the WebBrick Gateway's own time.
Type=http://id.webbrick.co.uk/events/webbrick/ST
Source=webbrick/fromNode/ST
ipAdr=dotted ip address
udpType=G
pktType=ST
fromNode=webbrick node number
hour=0-23
minute=0-59
second=0-59
day=0 to 6 where 0 is sunday.
