minor: Put Scene.PhysicsRequestAsset() into standard C# xml format.

OpenSim/Region/Framework/Scenes/Scene.cs

@@ -5638,10 +5638,17 @@ namespace OpenSim.Region.Framework.Scenes
             return m_SpawnPoint - 1;
         }
 
-        // Wrappers to get physics modules retrieve assets. Has to be done this way
-        // because we can't assign the asset service to physics directly - at the
-        // time physics are instantiated it's not registered but it will be by
-        // the time the first prim exists.
+        /// <summary>
+        /// Wrappers to get physics modules retrieve assets. 
+        /// </summary>
+        /// <remarks>
+        /// Has to be done this way
+        /// because we can't assign the asset service to physics directly - at the
+        /// time physics are instantiated it's not registered but it will be by
+        /// the time the first prim exists.
+        /// </remarks>
+        /// <param name="assetID"></param>
+        /// <param name="callback"></param>
         public void PhysicsRequestAsset(UUID assetID, AssetReceivedDelegate callback)
         {
             AssetService.Get(assetID.ToString(), callback, PhysicsAssetReceived);