BulletSim: remove degenerate triangles from meshes. This fixes the

invisible barriers in sculptie doorways (Mantis 6529).
Bump up level-of-detail for physical meshes to 32 (the max). This
fixes the invisible barriers that showed up in prim cut arches.
NOTE: the default LOD values are removed from OpenSimDefaults.ini.
   If you don't change your OpenSimDefaults.ini, you will continue
   to see the arch problem.

bin/OpenSimDefaults.ini

@@ -916,13 +916,9 @@
 
     ; Terrain Implementation {1|0} 0 for HeightField, 1 for Mesh terrain.  If you're using the bulletxna engine, 
     ;  you will want to switch to the heightfield option
-
     TerrainImplementation = 1
     ; TerrainImplementation = 0
 
-    DefaultFriction = 0.20
-    DefaultDensity = 10.000006836
-    DefaultRestitution = 0.0
     Gravity = -9.80665
 
     TerrainFriction = 0.30
@@ -931,7 +927,7 @@
     TerrainCollisionMargin = 0.04
 
     AvatarFriction = 0.2
-    AvatarStandingFriction = 10.0
+    AvatarStandingFriction = 0.95
     AvatarRestitution = 0.0
     AvatarDensity = 3.5
     AvatarCapsuleWidth = 0.6
@@ -943,7 +939,7 @@
 
     CollisionMargin = 0.04
 
-    ; Linkset constraint parameters
+    ; Linkset implmentation
     LinkImplementation = 1      ; 0=constraint, 1=compound
 
     ; Whether to mesh sculpties
@@ -952,14 +948,6 @@
     ; If 'true', force simple prims (box and sphere) to be meshed
     ForceSimplePrimMeshing = false
 
-    ; level of detail for physical meshes. 32,16,8 or 4 with 32 being full detail
-    MeshLevelOfDetail = 8
-    ; if mesh size is > threshold meters, we need to add more detail because people will notice
-    MeshLevelOfDetailMegaPrimThreshold = 10
-    MeshLevelOfDetailMegaPrim = 16
-    ; number^2 non-physical level of detail of the sculpt texture.  32x32 - 1024 verticies
-    SculptLevelOfDetail = 32
-
     ; Bullet step parameters
     MaxSubSteps = 10
     FixedTimeStep = .01667