#291 Make all random maps have an express exit on every floor by default

[DraugTheWhopper]

Some random maps are mdoerately deep, in remote parts of the world, and yet have no express exit. I can't think of any particular reason why random maps shouldn't just have express exits that take you back to the entrance of the first floor.

[Nicolas Weeger]

I'm not that eager for that addition. If we add one such exit, why wouldn't large maps like eg Wizard Tower have an express exit on all floors?

Note that you can also find random teleporters back to Scorn.