No cell stacking implemented (official version) (bugreport:9378)
- Split config cell_stack_limit into custom_cell_stack_limit (previous feature) and official_cell_stack_limit (see below)
- Expanded map_count_oncell by a flag parameter, currently only one flag is supported: only count standing units (needed for official cell stack feature)
- Added a new function map_closest_freecell that will return the closest free cell using the same order that official servers use
- Monsters will now actively search for a free cell when starting to walk randomly and when unlocking target
- When any unit finishes walking (regularly) and is not on a free cell, it will now actively search for a free cell
- Step actions will be delayed until a suitable cell was found, they will even be executed when the player walked slightly out of attack range