Reintroduce a fun hack

Yeah, looks like PhysX 2.6.4 has a bug with spawning stuff inside of
regions. So, let's bring back the hack that spawns the avatar at -2000
feet. The link-in process will set the correct position on the controller
and fire the appropriate detectors.

Sources/Plasma/PubUtilLib/plAvatar/plPhysicalControllerCore.cpp

@@ -70,7 +70,7 @@ plPhysicalControllerCore::plPhysicalControllerCore(plKey OwnerSceneObject, float
     fMovementStrategy(nil),
     fSimLength(0.0f),
     fLocalRotation(0.0f, 0.0f, 0.0f, 1.0f),
-    fLocalPosition(0.0f, 0.0f, 0.0f),
+    fLocalPosition(0.0f, 0.0f, -2000.0f),
     fLastLocalPosition(0.0f, 0.0f, 0.0f),
     fLinearVelocity(0.0f, 0.0f, 0.0f),
     fAchievedLinearVelocity(0.0f, 0.0f, 0.0f),