Created attachment 184251 [details] [review]
Update net monitor code to recent NM API

It seems the existing net monitor code is really, really old and was written for NM 0.5 or earlier, which hasn't been current since 2006.  Fix up the code to work with NM 0.6 and later (including the new API in NM 0.9).

One question: it doesn't seem like the code grabs the initial network state at all.  Can we grab that and update the state in the plugin init code, or is that too early?  If it's too early could an idle handler be scheduled to grab state after a second or two?