[NTOS]: Learn to build User PTEs as well, with MI_MAKE_HARDWARE_PTE_USER.

[NTOS]: Learn to build User PTEs as well, with MI_MAKE_HARDWARE_PTE_USER.
[NTOS]: MI_MAKE_HARDWARE_PTE becomes MI_MAKE_HARDWARE_PTE_KERNEL, since it assumed this. MI_MAKE_HARDWARE_PTE is now a "generic" you can use when you don't know what the PTE should be. It uses MiDetermineUserGlobalMask to set the right bits.
[NTOS]: Add two more helpers: MI_IS_PAGE_TABLE_ADDRESS and MI_IS_SYSTEM_PAGE_TABLE_ADDDRESS. One is in the symbols, the other I made up to make things clearer.
[NTOS]: MiResolveDemandZeroFault now knnows how to resolve user-demand-zero-faults.
[NTOS]: Implement MiZeroPfn to do the actual zeroing during user-demand-zero-faults (also later for VAD faults).

svn path=/trunk/; revision=48175