[PATCH v3 3/4] ntdll: Allow NtQueryVolumeInformationFile to query volume information from the mountmgr.

[Erich E. Hoover]

This patch allows NtQueryVolumeInformationFile to pass
FileFsVolumeInformation and FileFsAttributeInformation requests to the
mountmgr.  These requests currently do not work for NT device paths,
which results in a bunch of duplication in kernelbase.

Best,
Erich