Implement ability for hg logins to try fallback regions just like local logins.

These would be specified in the [GridService] section of Robust.HG.ini, which already lists these in the example text.
Untested patch so that Neb can easily pull in for testing, though shouldn't disrupt existing hg logins since fallback processing is a bit of code stuck on the end of the login sequence.
Revert "Implement ability for hg logins to try fallback regions just like local logins."

This approach does not work - it is taking place too far down the login process where really the region checking
could only be done when the hg map tiles are linked on the main map (messy and probably impossible) or possibly
when the final destination is fetched at the very first stage of teleport (which couldn't be done without a protocol
change to pass the agentID as well as the requested regionID)

This reverts commit 3d9b73c47a15cf00150ac80570fea88de8cecbdf.
minor: Make logging in GatekeeperService.LoginAgent() a bit more detailed so that we can distinguish between simultaneous logins
Stop "sit user name" and "stand user name" console commands from trying to sit/stand avatars already sitting/standing
In pCampbot, don't try and reconnect bots that are already connected on console "connect" command
Stop error messages being misleadingly generated when on client connection activity timeout, a root connection triggers a CloseAgent to a neighbour region which has already closed the agent due to inactivity.

Also separates out log messages to distinguish between close not finding an agent and wrong auth token, and downgrades former to debug and latter to warn
Stop "handle sit user name" command from trying to sit avatars on objects which have sit positions but are attachments
Add "set bots" command to make it possible to set SEND_AGENT_UPDATES on all bots whilst pCampbot is running
Make it possible to adjust the pCampbot login delay via the [BotManager] LoginDelay parameter of pCampbot.ini
Fix a further bug in pCampbot connect where ignoring already connected bots was wrongly counted as a connect

Also, only sleep when we actually perform a connection
minor: remove mono compiler warning from LLClientView