Change status to "online" when the server can actually be joined

[Altaric]

Currently the status goes to online when the server starts ("Factorio initialised").
But then it needs to load lots of stuff and if mods have changed, apply the time-consuming migration scripts.
Therefore, it would be better to change status "running" to "starting" and make it "running" when the console reads "Matching server connection resumed"

[grilledham]

I'll have to think about this. I wonder if there is a risk that the connection to the matching server fails, but the server can still be joinned through direct connect.