These stopped working because current code calculates sit heights based on avatar physics rather than appearance data.
Also changed BasicPhysics to not divide Z param of all set sizes by 2 - there's no obvious good reason for this and basicphysics is only used in tests
Fixes: Undo, T-pose of others on login, modifiedBulletX works again, feet now stand on the ground instead of in the ground, adds checks to CombatModule. Adds: Redo, Land Undo, checks to agentUpdate (so one can not fall off of a region), more vehicle parts. Finishes almost all of LSL (1 function left, 2 events).
Direct flames and kudos to Revolution, please
Signed-off-by: Melanie <melanie@t-data.com>