Whenever a NetworkInterfaceTL is shutdown redundantly, it emits a log message at info level indicating this is happening. This tends to just be spam, since NITL shuts itself down in its destructor, so its very common (almost always) for that shutdown to be redundant. We should remove this line or at least make it only emitted at a high debug level.

Additionally, ConnectionPool log messages don't include any metadata about the NetworkInterface they're associated with (e.g. this one about killing egress activity), so it's hard to tell what they're referring to. We should update these to make that association easier.