MSC subscriber conn FSM issues

In recent weeks, many of you have encountered and worked at failures of OsmoMSC's subscriber conn FSM / the conn itself to handle corner cases and/or cleanly handle error situations. I have plans for that FSM to be reviewed, adding probably two more states to it, a) to properly handle the early startup and b) gracefully release in all situations; and to probably more closely glue the conn struct to the FSM. My humble suggestion is to wait for me to review it and not spend more time on it until that is through. I wrote the FSM initially, and it makes sense that I clarify its structuring before all of you need to learn its current quirks. I hope it won't take too long, just need to sort the priorities of this fix versus the other tasks I have... ~N