Bitmap allocator documentation.

[Loren James Rittle]

> So, can I do something like this:
> bool Is_Threads_Enabled = __gthread_active_p();

Practically, yes.  The return of __gthread_active_p() is not suppose
to ever change because once you commit to avoiding mutex locking, you
can't easily go back.  BTW, yes, I think the implementation assumes
that people aren't playing dlopen tricks to get the thread library...

Loren