[NTOS]: Allocate the PEB at a pseudo-random address just like Windows XP SP2 and...

[NTOS]: Allocate the PEB at a pseudo-random address just like Windows XP SP2 and later, to prevent certain kinds of exploits.
[NTOS]: Allocate PEB and TEB using VADs! The user-mode fault handler seems to work fine, and I could find no regressions. This is the beginning of the end for MAREAs for VM allocations (they will remain for sections).

svn path=/trunk/; revision=48194