[BocoC]

updateterrain; use=probably same as updateboard;
spyfire 2,2; use=shoot flame like horse; params effect length of explosion;
setfocus 1,1; use=unknown;
resetfocus; use=probably undo setfocus feature.
playerz=filename; use=unknown;
drawovertrees; use=unknown, probably draws over trees, but, what doesnt?

Those are the only undocumented commands. Also, you got playerfreezetime wrong. Playerfreezetime holds the freezeplayer timeout. When it is -1, you aren't frozen.