Patch from 2010-10-20/22. Didn't apply cleanly so I redid it
manually and tested/checked it. There was only one difference
with imprudence: for some reason Singularity tries to see
if the "teleport history" floater is visible while initializing
the menu's, something that imprudence doesn't do. For the rest
the patch is basically the same. Nevertheless, I left all code
exactly as it was in Singularity (the only thing that this
commit changes is the intend of the original patch: in debug
mode, fail with an assertion when LindenUserDir is called while
it is not initialized; and then fix everything to make it work
again.
Original commit message:
The LindenUserDir (~/.imprudence/first_last/) cannot be initialized
before the user logged in. However, several singletons (that only can be
initialized once) depend on this directory for initialization. Therefore
we have to take care not to instantiate those singletons until after the
user logged in.
With regard to webit, this fixes the browser_profile (cache and cookies)
directory that the builtin browser uses.
