From the research conducted in
https://github.com/ioquake/ioq3/issues/794
we can probably conclude that the `self->r.maxs[2] = -8;`
in `player_die()` is related to `pm->maxs[2] = -8;`
in `PM_CheckDuck()`. Let's make this clear with a named constant.
* Updated TODO
* Moved ChangeLog to root
* Updated ChangeLog
* s/Foobar/Quake III Arena Source Code/
* Biggest patch EVAR. I wonder how many mail boxes this will fill...