[sldev] 1.21 change makes SL work better for enterprises

[Joshua Bell]

Dale Mahalko wrote:
> 
> A possible shared-cache location might be:
> \Documents and Settings\All Users\Application Data\SecondLife\cache

Hrm, I sense security/privacy issues:

* Do we pull down script sources into the local cache? If so, the next 
user who comes along can read your script source.
* If two of us are sharing a computer and we both have read/write access 
to the same cache, I can inspect the cache to find out what you've been 
looking at (ow, my eyes!)

I'll admit these are semi-obvious cases of "don't do such-and-such on 
public/shared computers!" and on everyone's-running-as-admin hosts we're 
already in that state.

> Though I believe special write privileges are needed for programs to
> write data into All Users. Students login using the restricted Users
> group so they don't have write access to anywhere they want, but
> programs storing data in All Users have proper write privileges even
> if the logged-in user does not.