[MERGED PR] Cyborg movement speed rebalance

[Lord_earthfire]

Now it feels that borgs with treads and screen head are just as fast as a non-sprinting human - but unlike humans, borgs can not sprint.

This sounds overall like a good place to be. Borgs should have never been faster than running humans without significant upgrades (thrusters or oil) anyway. A human burns down stamina and suffers heavy penalties in combat for sprinting.