try to make sure that local nodes take precedence over external ones

try to make sure that local nodes take precedence over external ones

There seems to be a problem with localnodes sometimes being overridden by
data from external PC92 data. Usually (but not always) data for local
PC19 nodes being overridden by data from other PC92 with the same node
connected.

Also put in a frig for the sysop announce problem.