Merge branch 'master' into careminster

Conflicts:
	OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
	OpenSim/Region/ClientStack/Linden/UDP/LLUDPServer.cs

OpenSim/Framework/IClientAPI.cs

@@ -749,14 +749,21 @@ namespace OpenSim.Framework
         /// </summary>
         string Name { get; }
 
-        /// <value>
-        /// Determines whether the client thread is doing anything or not.
-        /// </value>
+        /// <summary>
+        /// True if the client is active (sending and receiving new UDP messages).  False if the client is being closed.
+        /// </summary>
         bool IsActive { get; set; }
 
-        /// <value>
-        /// Determines whether the client is or has been removed from a given scene
-        /// </value>
+        /// <summary>
+        /// Set if the client is closing due to a logout request
+        /// </summary>
+        /// <remarks>
+        /// Do not use this flag if you want to know if the client is closing, since it will not be set in other
+        /// circumstances (e.g. if a child agent is closed or the agent is kicked off the simulator).  Use IsActive
+        /// instead with a IClientAPI.SceneAgent.IsChildAgent check if necessary.
+        ///
+        /// Only set for root agents.
+        /// </remarks>
         bool IsLoggingOut { get; set; }
         
         bool SendLogoutPacketWhenClosing { set; }

OpenSim/Framework/ISceneAgent.cs

@@ -26,6 +26,7 @@
  */
 
 using System;
+using OpenMetaverse;
 
 namespace OpenSim.Framework
 {
@@ -71,5 +72,11 @@ namespace OpenSim.Framework
         /// This includes scene object data and the appearance data of other avatars.
         /// </remarks>
         void SendInitialDataToMe();
+
+        /// <summary>
+        /// Direction in which the scene presence is looking.
+        /// </summary>
+        /// <remarks>Will be Vector3.Zero for a child agent.</remarks>
+        Vector3 Lookat { get; }        
     }
 }