Add --force flag to "kick user" console command to allow bypassing of recent race condition checks.

This is to allow a second attempt to remove an avatar even if "show connections" shows them as already inactive (i.e. close has already been attempted once).
You should only attempt --force if a normal kick fails.
This is partly for diagnostics as we have seen some connections occasionally remain on lbsa plaza even if they are registered as inactive.
This is not a permanent solution and may not work anyway - the ultimate solution is to stop this problem from happening in the first place.

OpenSim/Region/CoreModules/ServiceConnectorsOut/Simulation/LocalSimulationConnector.cs

@@ -312,7 +312,7 @@ namespace OpenSim.Region.CoreModules.ServiceConnectorsOut.Simulation
 //                        "[LOCAL SIMULATION CONNECTOR]: Found region {0} {1} to send AgentUpdate",
 //                        s.RegionInfo.RegionName, destination.RegionHandle);
 
-                Util.FireAndForget(delegate { m_scenes[destination.RegionID].IncomingCloseAgent(id); });
+                Util.FireAndForget(delegate { m_scenes[destination.RegionID].IncomingCloseAgent(id, false); });
                 return true;
             }