We've been discussing using nodes/paths to store information for 
non-slon active node, but didn't come to a conclusion so far.

Currently, listens will be generated for every path regardless of the 
node's activity. If a node will never have a running slon daemon, events 
for this node will collect and prevent cleanup of old events, which is bad.

As a fix, I'd propose to generate listens from paths only between 
_active_ nodes, i.e. add "and N1.no_active and N2.no_active" to the 
select condition in rebuildlistenentries(). A node that's not active 
will never process events, and never generate events so IMHO it's 
correct to have no listens for such nodes. In addition, 
rebuildlistenentries() probably needs to be added to enablenode() and 
disablenode() (as soon as it's implemented) too.

Regards,
Andreas