Netcode : Deprecate #RM in favor of #FA and #FM

[Salanto]

AO has supported updating the area and music list independently for a few versions now, yet still supports the legacy netcode behaviour of RM providing both, forcing the client needs to parse it on its own.
This adds unnecessary logic to what should be a very simple for loop to add them to the widget and creates ambiguity on the correct approach.

In the same heartbeat AO should consider changing MC to solely be used for music switching and introduce its own packet for area switching, thus finally resolving one of the most jarring netcode design of this decade.

[oldmud0]

Need to effect some change on the server side rather than the client side if we want this to happen.