MMaps Updates, Needs tested.

Port From (https://github.com/TrinityCore/TrinityCore)

Source/Framework/RecastDetour/Detour/DetourNavMeshBuilder.cs

@@ -80,6 +80,11 @@ public static partial class Detour
         DT_RAYCAST_USE_COSTS = 0x01,        ///< Raycast should calculate movement cost along the ray and fill RaycastHit::cost
     };
 
+    enum dtDetailTriEdgeFlags
+    {
+        DT_DETAIL_EDGE_BOUNDARY = 0x01,     ///< Detail triangle edge is part of the poly boundary
+    };
+
     /// Flags representing the type of a navigation mesh polygon.
     public enum dtPolyTypes
     {
@@ -616,7 +621,8 @@ public static partial class Detour
         /// The detail mesh's unique vertices. [(x, y, z) * dtMeshHeader::detailVertCount]
         public float[] detailVerts;
 
-        /// The detail mesh's triangles. [(vertA, vertB, vertC) * dtMeshHeader::detailTriCount]
+        /// The detail mesh's triangles. [(vertA, vertB, vertC, triFlags) * dtMeshHeader::detailTriCount].
+        /// See dtDetailTriEdgeFlags and dtGetDetailTriEdgeFlags.
         public byte[] detailTris;
 
         /// The tile bounding volume nodes. [Size: dtMeshHeader::bvNodeCount]
@@ -631,6 +637,15 @@ public static partial class Detour
         public dtMeshTile next;						//< The next free tile, or the next tile in the spatial grid.
     };
 
+    /// Get flags for edge in detail triangle.
+    /// @param	triFlags[in]		The flags for the triangle (last component of detail vertices above).
+    /// @param	edgeIndex[in]		The index of the first vertex of the edge. For instance, if 0,
+    ///								returns flags for edge AB.
+    public static int dtGetDetailTriEdgeFlags(byte triFlags, int edgeIndex)
+    {
+        return (triFlags >> (edgeIndex * 2)) & 0x3;
+    }
+
     /// Configuration parameters used to define multi-tile navigation meshes.
     /// The values are used to allocate space during the initialization of a navigation mesh.
     // @see dtNavMesh::init()