[FASTFAT]

[FASTFAT]
- Add a flag to enable (or disable depends on your reading ;-)) the VPB swapout process for volume umount.
- By default, disable it for MSVC builds.

This *might* lolfix the MSVC builds.

Just for the record, we also have a bug in the GCC builds but it doesn't seem to show up.
The main issue is that after formatting, we close handle to the volume, and IRP_MJ_CLEANUP is properly received and initiates a bit of dismount.
But then, the IRP_MJ_CLOSE is never received (why????) and thus, dismount cannot properly end.
This is a real & serious issue.

svn path=/trunk/; revision=65527