Instead of swallowing any socket begin/end receive exceptions, log them for debugging purposes.

This may reveal why on some teleports with current code, the UseCircuitCode message gets through but CompleteMovement disappears into the ether.
Reinsert 200ms sleep accidentally removed in commit 7dbc93c (Wed Sep 18 21:41:51 2013 +0100)
Reinsert client.SceneAgent checks into LLUDPServer.HandleCompleteMovementIntoRegion() to fix race condition regression in commit 7dbc93c (Wed Sep 18 21:41:51 2013 +0100)

This check is necessary to close a race condition where the CompleteAgentMovement processing could proceed when the UseCircuitCode thread had added the client to the client manager but before the ScenePresence had registered to process the CompleteAgentMovement message.
This is most probably why the message appeared to get lost on a proportion of entity transfers.
A better long term solution may be to set the IClientAPI.SceneAgent property before the client is added to the manager.
Move adding UUID.Zero -> Unknown User binding to UMM.Init() so that it's also called by HGUserManagementModule
minor: correct spelling of Initialized in LSC connector version message
minor: log MaxOutgoingTransferVersion at EntityTransferModule startup
minor: Add scene name to baked textures in cache log message
minor: Comment out windlight log message about sending scene data for now.
minor: correct attachment spelling mistake in log message in HGEntityTransferModule.OnIncomingSceneObject()
minor: Clean up tabbing and spacing issues in OpenSim.ini.example
minor: Make OpenSimDefaults.ini consistent (spacing and tabs to spaces)
minor code formatting for the sake of consistency and readability
refactor: rename Scene.IncomingCloseAgent() to CloseAgent() in order to make it clear that all non-clientstack callers should be using this rather than RemoveClient() in order to step through the ScenePresence state machine properly.

Adds IScene.CloseAgent() to replace RemoveClient()
refactor: Rename Scene.AddNewClient() to AddNewAgent() to make it obvious in the code that this is symmetric with CloseAgent()
minor: Disable logging left active on regression test TestSameSimulatorIsolatedRegionsV2()
Merge remote-tracking branch 'upstream/master'