37 files changed, 195 insertions, 0 deletions

diff --git a/OpenSim/Client/Linden/LLClientStackModule.cs b/OpenSim/Client/Linden/LLClientStackModule.cs
index 74612bb..09177f6 100644
--- a/OpenSim/Client/Linden/LLClientStackModule.cs
+++ b/OpenSim/Client/Linden/LLClientStackModule.cs
@@ -110,6 +110,11 @@ namespace OpenSim.Client.Linden
 
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "LLClientStackModule"; }
diff --git a/OpenSim/Client/Linden/LLProxyLoginModule.cs b/OpenSim/Client/Linden/LLProxyLoginModule.cs
index f7608d1..0e4b549 100644
--- a/OpenSim/Client/Linden/LLProxyLoginModule.cs
+++ b/OpenSim/Client/Linden/LLProxyLoginModule.cs
@@ -125,6 +125,11 @@ namespace OpenSim.Client.Linden
 
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "LLProxyLoginModule"; }
diff --git a/OpenSim/Client/Linden/LLStandaloneLoginModule.cs b/OpenSim/Client/Linden/LLStandaloneLoginModule.cs
index 21197f8..dde5fb0 100644
--- a/OpenSim/Client/Linden/LLStandaloneLoginModule.cs
+++ b/OpenSim/Client/Linden/LLStandaloneLoginModule.cs
@@ -155,6 +155,11 @@ namespace OpenSim.Client.Linden
             }
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "LLStandaloneLoginModule"; }
diff --git a/OpenSim/Region/CoreModules/Agent/Capabilities/CapabilitiesModule.cs b/OpenSim/Region/CoreModules/Agent/Capabilities/CapabilitiesModule.cs
index 0c7882a..a65262f 100644
--- a/OpenSim/Region/CoreModules/Agent/Capabilities/CapabilitiesModule.cs
+++ b/OpenSim/Region/CoreModules/Agent/Capabilities/CapabilitiesModule.cs
@@ -81,6 +81,11 @@ namespace OpenSim.Region.CoreModules.Agent.Capabilities
             get { return "Capabilities Module"; } 
         }
 
+        public Type ReplacableInterface
+        {
+            get { return null; }
+        }
+
         public void AddCapsHandler(UUID agentId)
         {
             if (m_scene.RegionInfo.EstateSettings.IsBanned(agentId))
diff --git a/OpenSim/Region/CoreModules/Asset/CenomeAssetCache.cs b/OpenSim/Region/CoreModules/Asset/CenomeAssetCache.cs
index 0d73296..5ce8cd0 100644
--- a/OpenSim/Region/CoreModules/Asset/CenomeAssetCache.cs
+++ b/OpenSim/Region/CoreModules/Asset/CenomeAssetCache.cs
@@ -290,6 +290,11 @@ namespace OpenSim.Region.CoreModules.Asset
             get { return "CenomeMemoryAssetCache"; }
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         /// <summary>
         /// New region is being added to server.
         /// </summary>
diff --git a/OpenSim/Region/CoreModules/Asset/CoreAssetCache.cs b/OpenSim/Region/CoreModules/Asset/CoreAssetCache.cs
index 0ae206d..445a469 100644
--- a/OpenSim/Region/CoreModules/Asset/CoreAssetCache.cs
+++ b/OpenSim/Region/CoreModules/Asset/CoreAssetCache.cs
@@ -54,6 +54,11 @@ namespace OpenSim.Region.CoreModules.Asset
             get { return "CoreAssetCache"; }
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public void Initialise(IConfigSource source)
         {
             IConfig moduleConfig = source.Configs["Modules"];
diff --git a/OpenSim/Region/CoreModules/Asset/FlotsamAssetCache.cs b/OpenSim/Region/CoreModules/Asset/FlotsamAssetCache.cs
index 6ea9e27..9a165fb 100644
--- a/OpenSim/Region/CoreModules/Asset/FlotsamAssetCache.cs
+++ b/OpenSim/Region/CoreModules/Asset/FlotsamAssetCache.cs
@@ -146,6 +146,11 @@ namespace Flotsam.RegionModules.AssetCache
             m_InvalidChars.AddRange(Path.GetInvalidFileNameChars());
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return m_ModuleName; }
diff --git a/OpenSim/Region/CoreModules/Asset/GlynnTuckerAssetCache.cs b/OpenSim/Region/CoreModules/Asset/GlynnTuckerAssetCache.cs
index d3a5006..cea5dd6 100644
--- a/OpenSim/Region/CoreModules/Asset/GlynnTuckerAssetCache.cs
+++ b/OpenSim/Region/CoreModules/Asset/GlynnTuckerAssetCache.cs
@@ -51,6 +51,11 @@ namespace OpenSim.Region.CoreModules.Asset
         // Instrumentation
         private uint m_DebugRate = 0;
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "GlynnTuckerAssetCache"; }
diff --git a/OpenSim/Region/CoreModules/Avatar/Chat/ChatModule.cs b/OpenSim/Region/CoreModules/Avatar/Chat/ChatModule.cs
index dba6b38..9e85b11 100644
--- a/OpenSim/Region/CoreModules/Avatar/Chat/ChatModule.cs
+++ b/OpenSim/Region/CoreModules/Avatar/Chat/ChatModule.cs
@@ -125,6 +125,11 @@ namespace OpenSim.Region.CoreModules.Avatar.Chat
         {
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public virtual string Name
         {
             get { return "ChatModule"; }
diff --git a/OpenSim/Region/CoreModules/Scripting/LSLHttp/UrlModule.cs b/OpenSim/Region/CoreModules/Scripting/LSLHttp/UrlModule.cs
index 50d3fbe..7d2876c 100644
--- a/OpenSim/Region/CoreModules/Scripting/LSLHttp/UrlModule.cs
+++ b/OpenSim/Region/CoreModules/Scripting/LSLHttp/UrlModule.cs
@@ -74,6 +74,11 @@ namespace OpenSim.Region.CoreModules.Scripting.LSLHttp
 
         private IHttpServer m_HttpServer = null;
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "UrlModule"; }
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsIn/Asset/AssetServiceInConnectorModule.cs b/OpenSim/Region/CoreModules/ServiceConnectorsIn/Asset/AssetServiceInConnectorModule.cs
index 3d7decc..6227cca 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsIn/Asset/AssetServiceInConnectorModule.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsIn/Asset/AssetServiceInConnectorModule.cs
@@ -77,6 +77,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsIn.Asset
         {
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "RegionAssetService"; }
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsIn/Authentication/HGAuthServiceInConnectorModule.cs b/OpenSim/Region/CoreModules/ServiceConnectorsIn/Authentication/HGAuthServiceInConnectorModule.cs
index a991393..f4ebc70 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsIn/Authentication/HGAuthServiceInConnectorModule.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsIn/Authentication/HGAuthServiceInConnectorModule.cs
@@ -81,6 +81,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsIn.Authentication
         {
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "HGAuthServiceInConnectorModule"; }
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsIn/Inventory/InventoryServiceInConnectorModule.cs b/OpenSim/Region/CoreModules/ServiceConnectorsIn/Inventory/InventoryServiceInConnectorModule.cs
index 0ed7464..b9c942f 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsIn/Inventory/InventoryServiceInConnectorModule.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsIn/Inventory/InventoryServiceInConnectorModule.cs
@@ -77,6 +77,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsIn.Inventory
         {
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "RegionInventoryService"; }
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsIn/Land/LandServiceInConnectorModule.cs b/OpenSim/Region/CoreModules/ServiceConnectorsIn/Land/LandServiceInConnectorModule.cs
index 213a769..6b5b74e 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsIn/Land/LandServiceInConnectorModule.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsIn/Land/LandServiceInConnectorModule.cs
@@ -81,6 +81,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsIn.Land
         {
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "LandServiceInConnectorModule"; }
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsIn/Neighbour/NeighbourServiceInConnectorModule.cs b/OpenSim/Region/CoreModules/ServiceConnectorsIn/Neighbour/NeighbourServiceInConnectorModule.cs
index f283c89..e7a4e25 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsIn/Neighbour/NeighbourServiceInConnectorModule.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsIn/Neighbour/NeighbourServiceInConnectorModule.cs
@@ -81,6 +81,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsIn.Neighbour
         {
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "NeighbourServiceInConnectorModule"; }
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsIn/Simulation/SimulationServiceInConnectorModule.cs b/OpenSim/Region/CoreModules/ServiceConnectorsIn/Simulation/SimulationServiceInConnectorModule.cs
index 9e7e10d..45f203b 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsIn/Simulation/SimulationServiceInConnectorModule.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsIn/Simulation/SimulationServiceInConnectorModule.cs
@@ -77,6 +77,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsIn.Simulation
         {
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "SimulationService"; }
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/HGAssetBroker.cs b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/HGAssetBroker.cs
index a9e9dc2..2990299 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/HGAssetBroker.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/HGAssetBroker.cs
@@ -52,6 +52,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
 
         private bool m_Enabled = false;
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "HGAssetBroker"; }
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/LocalAssetServiceConnector.cs b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/LocalAssetServiceConnector.cs
index 13c4b52..cda205b 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/LocalAssetServiceConnector.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/LocalAssetServiceConnector.cs
@@ -51,6 +51,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
 
         private bool m_Enabled = false;
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "LocalAssetServicesConnector"; }
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/RemoteAssetServiceConnector.cs b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/RemoteAssetServiceConnector.cs
index e554c68..a603173 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/RemoteAssetServiceConnector.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Asset/RemoteAssetServiceConnector.cs
@@ -48,6 +48,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Asset
         private bool m_Enabled = false;
         private IImprovedAssetCache m_Cache;
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "RemoteAssetServicesConnector"; }
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Inventory/HGInventoryBroker.cs b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Inventory/HGInventoryBroker.cs
index 9f6c1a2..1b3d815 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Inventory/HGInventoryBroker.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Inventory/HGInventoryBroker.cs
@@ -56,6 +56,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Inventory
         private ISessionAuthInventoryService m_HGService;
 
         private string m_LocalGridInventoryURI = string.Empty;
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "HGInventoryBroker"; }
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Inventory/LocalInventoryServiceConnector.cs b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Inventory/LocalInventoryServiceConnector.cs
index 8f04025..a304357 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Inventory/LocalInventoryServiceConnector.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Inventory/LocalInventoryServiceConnector.cs
@@ -53,6 +53,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Inventory
         private bool m_Enabled = false;
         private bool m_Initialized = false;
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "LocalInventoryServicesConnector"; }
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Inventory/RemoteInventoryServiceConnector.cs b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Inventory/RemoteInventoryServiceConnector.cs
index 9b51da7..31f4032 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Inventory/RemoteInventoryServiceConnector.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Inventory/RemoteInventoryServiceConnector.cs
@@ -50,6 +50,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Inventory
         private Scene m_Scene;
         private InventoryServicesConnector m_RemoteConnector;
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "RemoteInventoryServicesConnector"; }
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Land/LocalLandServiceConnector.cs b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Land/LocalLandServiceConnector.cs
index 73d12e5..2b7f7e8 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Land/LocalLandServiceConnector.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Land/LocalLandServiceConnector.cs
@@ -60,6 +60,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Land
 
         #region ISharedRegionModule
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "LocalLandServicesConnector"; }
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Land/RemoteLandServiceConnector.cs b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Land/RemoteLandServiceConnector.cs
index 27f811c..f50cef9 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Land/RemoteLandServiceConnector.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Land/RemoteLandServiceConnector.cs
@@ -49,6 +49,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Land
         private bool m_Enabled = false;
         private LocalLandServicesConnector m_LocalService;
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "RemoteLandServicesConnector"; }
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Neighbour/LocalNeighbourServiceConnector.cs b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Neighbour/LocalNeighbourServiceConnector.cs
index f16bc46..0d4a09f 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Neighbour/LocalNeighbourServiceConnector.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Neighbour/LocalNeighbourServiceConnector.cs
@@ -60,6 +60,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Neighbour
 
         #region ISharedRegionModule
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "LocalNeighbourServicesConnector"; }
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Neighbour/RemoteNeighourServiceConnector.cs b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Neighbour/RemoteNeighourServiceConnector.cs
index dc876e3..01c95d7 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsOut/Neighbour/RemoteNeighourServiceConnector.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsOut/Neighbour/RemoteNeighourServiceConnector.cs
@@ -51,6 +51,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Neighbour
         private string serviceDll;
         private List<Scene> m_Scenes = new List<Scene>();
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "RemoteNeighbourServicesConnector"; }
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsOut/User/LocalUserServiceConnector.cs b/OpenSim/Region/CoreModules/ServiceConnectorsOut/User/LocalUserServiceConnector.cs
index 1efb8f6..c8703ee 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsOut/User/LocalUserServiceConnector.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsOut/User/LocalUserServiceConnector.cs
@@ -46,6 +46,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.User
 
         private bool m_Enabled = false;
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "LocalUserServicesConnector"; }
diff --git a/OpenSim/Region/CoreModules/ServiceConnectorsOut/User/RemoteUserServiceConnector.cs b/OpenSim/Region/CoreModules/ServiceConnectorsOut/User/RemoteUserServiceConnector.cs
index 2e9739b..41d360f 100644
--- a/OpenSim/Region/CoreModules/ServiceConnectorsOut/User/RemoteUserServiceConnector.cs
+++ b/OpenSim/Region/CoreModules/ServiceConnectorsOut/User/RemoteUserServiceConnector.cs
@@ -25,6 +25,7 @@
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+using System;
 using Nini.Config;
 using log4net;
 using System.Reflection;
@@ -44,6 +45,11 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.User
 
         private bool m_Enabled = false;
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "RemoteUserServicesConnector"; }
diff --git a/OpenSim/Region/CoreModules/World/Terrain/TerrainModule.cs b/OpenSim/Region/CoreModules/World/Terrain/TerrainModule.cs
index 4d01f22..8c905d6 100644
--- a/OpenSim/Region/CoreModules/World/Terrain/TerrainModule.cs
+++ b/OpenSim/Region/CoreModules/World/Terrain/TerrainModule.cs
@@ -159,6 +159,11 @@ namespace OpenSim.Region.CoreModules.World.Terrain
         {
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "TerrainModule"; }
diff --git a/OpenSim/Region/CoreModules/World/WorldMap/WorldMapModule.cs b/OpenSim/Region/CoreModules/World/WorldMap/WorldMapModule.cs
index cf04fc8..1c7baa2 100644
--- a/OpenSim/Region/CoreModules/World/WorldMap/WorldMapModule.cs
+++ b/OpenSim/Region/CoreModules/World/WorldMap/WorldMapModule.cs
@@ -128,6 +128,11 @@ namespace OpenSim.Region.CoreModules.World.WorldMap
         {
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public virtual string Name
         {
             get { return "WorldMapModule"; }
diff --git a/OpenSim/Region/Framework/Interfaces/IRegionModuleBase.cs b/OpenSim/Region/Framework/Interfaces/IRegionModuleBase.cs
index 3888d2c..885f1ff 100644
--- a/OpenSim/Region/Framework/Interfaces/IRegionModuleBase.cs
+++ b/OpenSim/Region/Framework/Interfaces/IRegionModuleBase.cs
@@ -40,6 +40,20 @@ namespace OpenSim.Region.Framework.Interfaces
         string Name { get; }
 
         /// <summary>
+        /// If this returns non-null, it is the type of an interface that
+        /// this module intends to register.
+        /// This will cause the loader to defer loading of this module
+        /// until all other modules have been loaded. If no other module
+        /// has registered the interface by then, this module will be
+        /// activated, else it will remain inactive, letting the other module
+        /// take over. This should return non-null ONLY in modules that are
+        /// intended to be easily replacable, e.g. stub implementations
+        /// that the developer expects to be replaced by third party provided
+        /// modules.
+        /// </summary>
+        Type ReplacableInterface { get; }
+
+        /// <summary>
         /// This is called to initialize the region module. For shared modules, this is called
         /// exactly once, after creating the single (shared) instance. For non-shared modules,
         /// this is called once on each instance, after the instace for the region has been created.
diff --git a/OpenSim/Region/OptionalModules/Avatar/Chat/IRCBridgeModule.cs b/OpenSim/Region/OptionalModules/Avatar/Chat/IRCBridgeModule.cs
index 0c696e3..d7e7a56 100644
--- a/OpenSim/Region/OptionalModules/Avatar/Chat/IRCBridgeModule.cs
+++ b/OpenSim/Region/OptionalModules/Avatar/Chat/IRCBridgeModule.cs
@@ -54,6 +54,11 @@ namespace OpenSim.Region.OptionalModules.Avatar.Chat
 
         #region INonSharedRegionModule Members
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "IRCBridgeModule"; }
diff --git a/OpenSim/Region/OptionalModules/Avatar/Concierge/ConciergeModule.cs b/OpenSim/Region/OptionalModules/Avatar/Concierge/ConciergeModule.cs
index 96b6888..21c0ab1 100644
--- a/OpenSim/Region/OptionalModules/Avatar/Concierge/ConciergeModule.cs
+++ b/OpenSim/Region/OptionalModules/Avatar/Concierge/ConciergeModule.cs
@@ -214,6 +214,11 @@ namespace OpenSim.Region.OptionalModules.Avatar.Concierge
         {
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public override string Name
         {
             get { return "ConciergeModule"; }
diff --git a/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/XmlRpcGroupsMessaging.cs b/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/XmlRpcGroupsMessaging.cs
index 9625342..4095041 100644
--- a/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/XmlRpcGroupsMessaging.cs
+++ b/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/XmlRpcGroupsMessaging.cs
@@ -177,6 +177,11 @@ namespace OpenSim.Region.OptionalModules.Avatar.XmlRpcGroups
             m_msgTransferModule = null;
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "XmlRpcGroupsMessaging"; }
diff --git a/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/XmlRpcGroupsModule.cs b/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/XmlRpcGroupsModule.cs
index da45177..b43a6ac 100644
--- a/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/XmlRpcGroupsModule.cs
+++ b/OpenSim/Region/OptionalModules/Avatar/XmlRpcGroups/XmlRpcGroupsModule.cs
@@ -222,6 +222,11 @@ namespace OpenSim.Region.OptionalModules.Avatar.XmlRpcGroups
             m_clientRequestIDFlushTimer.Stop();
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "XmlRpcGroupsModule"; }
diff --git a/OpenSim/Region/ScriptEngine/DotNetEngine/ScriptEngine.cs b/OpenSim/Region/ScriptEngine/DotNetEngine/ScriptEngine.cs
index 5549ea8..ec94afa 100644
--- a/OpenSim/Region/ScriptEngine/DotNetEngine/ScriptEngine.cs
+++ b/OpenSim/Region/ScriptEngine/DotNetEngine/ScriptEngine.cs
@@ -207,6 +207,11 @@ namespace OpenSim.Region.ScriptEngine.DotNetEngine
         {
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "Common." + ScriptEngineName; }
diff --git a/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs b/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
index 1b26391..dff53dd 100644
--- a/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
+++ b/OpenSim/Region/ScriptEngine/XEngine/XEngine.cs
@@ -402,6 +402,11 @@ namespace OpenSim.Region.ScriptEngine.XEngine
             return 0;
         }
 
+        public Type ReplacableInterface 
+        {
+            get { return null; }
+        }
+
         public string Name
         {
             get { return "XEngine"; }