When take back an object, store in known parent inv folder

[lickx]

This would allow you to take the object back, then the object is back in its original inventory folder.
This would also help in showing the most recent object rezzed in the "About Land" floater, in the Objects tab Mantis 5962

Database
This doesn't need a database migration, all fields exist.

OAR's
Todo: do rez time and parentfolder get written away (save oar) and loaded (load oar)?

On OAR export; both object rez time and object parent inv folder need to be serialized
rez time in unixtime, parent inv folder is a UUID

On OAR import; both object rez time and object parent inv folder need to be de-serialized
With OAR import, if parent inv folder doesn't exist or no such UUID is specified, set the rezzed obj parent inv folder to null key. If no rezdate value exists, set the rezzed obj date to NOW in unixtime

Rezzing an object
The object gets reztime NOW in unixtime, and parent inv folder set to the UUID of the inventory folder the object was rezzed from.
This is already the case. These data get stored and loaded.

Taking back an object
If the parent inv folder taken from the object exists, add the object there. If it is NULL, put it in the system Objects folder. This unfortunately only works until the region is restarted. After a restart, when taking an object it lands in Objects within inventory, not in its parent folder. This is strange, because the code shows the parent folder is set on the item to be returned to inventory.

• PrimCountModule
• LandManagement