ns: Handle BYE control message
ns: Handle BYE control message

The BYE control message signals that a node is gone, drop all services
from our register and propagate this message to all local servies - to
allow them to clean up any resources associated with potential remote
clients.

Signed-off-by: Bjorn Andersson <6e6fda072d932515099508d6d220572c68e9add5@linaro.org>

andersson/qrtr,andersson/qrtr,andersson/qrtr