[sldev] Texture Garbage Collection

[Argent Stonecutter]

> There is garbage collection, but as you noted it is very slow.
> Basically we scan the entire world dataset, including inventory items,
> region state files (textures on objects, textures as inventory items
> inside objects) and assets (notecards and script text).  Anything that
> looks like a texture UUID is added to a list, then textures (well, all
> assets really) that aren't on the list are deleted.

What about script variables?

There's quite a few scripted objects that take texture IDs from chat  
and store them in variables or lists.