Fix heatsinks damaging characters outside the damage area

Fix a crash when drive or heatsink is closed

Change EntityFlag value used to mark stealthed entities from 0x1000000 to 0x20000000
This should fix turrets targeting stealthed grids.

Fixed grids not properly decloaking if a thruster was destroyed in the process.
Fixed armour blocks remaining as visual-only frames if destroyed while cloaked.

Fixed floating point inaccuracy resulting in armour blocks incorrectly taking damage from heatsinks at large distances from world origin.

Added detailed logging of possible issues loading config file.

Fixed incorrect damage application to armor blocks by venting heat sinks.

Fixed heat sink DoDamage setting not being respected.

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