Glacier2/simpleChat detects dead router on shutdown

[bentoi]

When killing the simpleChat server:

./server
^CDetected dead router - destroying all associated sessions 

The close callback should check the connection's exception and only print this message if the exception is not ObjectAdapterDeactivationException

[pepone]

@bentoi how can we get the exception here? the exception is not passed to the connection close callback

[bentoi]

The close callback could throw the connection's exception with Connection::throwException.