remove some plenks

no logic changes
kill the cargo instead of just destroying it

fixes #2983 and the player statistics
Don't crash when the player to drop can't be found.

fixes #3224
log the catched exception when a client is dropped

because order dispatching failed for debugging
remove some plenks

no logic changes
log exception thrown when the handshake fails
remove some plenks

no logic changes
Attack the center of the cell instead of the top left corner

to not discriminate bottom right directions. Fixes #2205
inform the user which sound engine is used
display the last ServerError in the connection failed dialog

closes #2727
fix some plenks

no logic changes
Simplify and increase robustness of Shroud et al. Fixes #3440.
Add an extra sanity check.
Only update vis for actors in the world. Fixes #2726.
Remove harvester dependency on RenderUnit.
Add WithHarvestAnimation for TS and D2K harvester animations.
Allow Harvester to define the number of harvestable facings.
Add D2k harvest animation.

harvest2.shp is movingsand2.shp with a corrected frame order.
Fix D2k harvester dock animation.
Allow force-move to disable the harvest activity. Fixes #3459.