Fixed a bug in route change logic when a network is being moved to a new tunnel which was specifcially brought up just for that network. In this case is is important not to attempt to programmatically add the network to the tunnel because the kernel will already have done so when the tunnel was brought up. Similar logic for this condition already exists in addroute(), it just needed to be added to chroute() as well.
Fixed a bug in route change logic when a network is being moved to a new tunnel
which was specifcially brought up just for that network. In this case is is
important not to attempt to programmatically add the network to the tunnel
because the kernel will already have done so when the tunnel was brought up.
Similar logic for this condition already exists in addroute(), it just needed
to be added to chroute() as well.

ke6jjj/44ripd,ke6jjj/44ripd