In some circumstances (like the server only being reachable over IPv6)
reconnecting when the network becomes available doesn't work. This due
to the network only being "partially" available (in the example: IPv4
working, but IPv6 not yet). By also listening for changes of the link
properties a new connection attempt is made when for example the IP
addresses of the link, or the networking routes change. Meaning that the
example issue is fixed, as a new attempt is made after the IPv6 address
is set on the link / the routes for IPv6 networking are available.

RobertMe deleted the reconnect-changed-properties branch