Detect changed IP addresses and/or changed networks
Many apps would like to react when the IP changes. We would also like to do this internally, for the purpose of considering that our guards many have changed their status, and so on.
Step one for this ticket, though, is just to add support for detecting IP changes. This could be done by looking at "your ip is" messages from NETINFO cells; this could be done by looking at platform-specific network interface APIs; and this could also be done by looking at getaddrinfo() on newly opened sockets.