LTS random end position

[rakiru]

Currently in LTS, the border always shrinks in the centre. It would be more interesting if it picked a random spot in the map instead. It may be better if it was weighted a bit to prefer areas towards the centre of the map, but play-testing may prove that to be unnecessary. It may also/alternatively be a good idea to avoid the very edge of the map.

[dany-on-demand]

Also don't forget to avoid water areas.