Fix a typo in base.fgd ambient_generic
APC/Jeep updates underwater state for the driver
Update "Failed to allocate optimal read buffer" warning
Add Combine APC to spawnmenu
* Using a custom vehicle script derived from jalopy
Disable poseparam interpolation for vehicles in singleplayer
* This makes wheels not lag behind the physics objects, and paradoxically looks more consistent with multiplayer
APC can no longer just drive underwater
Update Combien APC model with more suspension travel
Fix warnings about "two path IDs" during loading saves
More minor cleanups