If OpenSimulator is writing a PID file and finds the file already present on startup, logging an error since this is commonly due to an unclean shutdown.

Unclean shutdown can cause constantly moving objects to disappear if an OAR has just been loaded and they have not reached persistence time threshold, among other problems.
Merge branch 'master' of ssh://opensimulator.org/var/git/opensim
minor: Log an exception if we aren't able to delete a script state file rather than simply ignoring it.

This should never normally happen but if it does then it can be valuable diagonstic information.
Add more notes to async_call_method relating to  UnsafeQueueUserWorkItem

UnsafeQueueUserWorkItem is so called because it allows the calling code to escalate its security privileges.
However, since we must already trust this code anyway in OpenSimulator this is not an issue.
Comment out rez perms logging I accidentally left in at 7f07023 (Sat Apr 6 02:34:51 2013)
minor: Make exceptions thrown by MySQLAssetData more consistent.
minor: remove mono compiler warnings in InventoryAccessModule
minor: fix mono compiler warning in ScriptsHttpRequests.cs
BulletSim: fix problem where large sets of mega-regions weren't registering
all the terrain with the base region.
BulletSim: add Bullet HACD library invocation. Turned off by default as not
totally debugged. Updated DLLs and SOs with more debugged HACD library code.
Another algorithm for AngularVerticalAttraction. This one Takes into account all rotations before it and makes the corrections more close to the time that sl does.

Signed-off-by: Robert Adams <Robert.Adams@intel.com>
BulletSim: some formatting changes.
BulletSim: fixing problems with llMoveToTarget. Not all fixed yet.
refactor: Remove IClientNetworkServer.NetworkStop() in favour of existing Stop().

This was an undocumented interface which I think was for long defunct region load balancing experiments.
Also adds method doc for some IClientNetworkServer methods.
Merge remote-tracking branch 'opensim/master' into develop

Conflicts:
	bin/OpenSimDefaults.ini -> removed