Suggestion: Per-world flag war configs (Low priority)

[BunkerSlav]

The ability to disable flag war in some worlds in the flag war config (yeah I know that LlmDl said something about tying it to the towny war setting but I think it would be more convenient in the config here, especially if I want siegewar in one world and flagwar in another), as well as being able to set all of its varied settings for any and all worlds.

So how many defenders are online, how many attackers are online, the economic transactions involved, the banner block used for war, etc. All of this should be configurable per-world.

It's a low priority suggestion though as it's really not that important. I imagine most admins who use flagwar, including me, only really have one pvp world anyways or just don't have multiple worlds but are running a one world SMP, so this is kind of a niche request.