(PR#9610) autosettler "territory" and danger maps

<URL: http://bugs.freeciv.org/Ticket/Display.html?id=9610 >

> [per - Sun Dec 19 23:59:39 2004]:
> 
> I am not too hot on your fix, though. Using genlists directly is bad. I
> think perhaps using a specvec here might be better. We know how big to
> make it beforehand, and we won't be doing any inserts/deletions after we
> have created it, before we deallocate and recreate it.

Yes, I also think this will look cleaner, besides using less and more
contiguous mem (read cache friendly layout) than a genlist.