Convert VFS file to placeholder again if needed

Convert VFS file to placeholder again if needed

Note that Windows may convert a placeholder file to a regular file when
it is replaced by another file, even if the old and new file (inode,
modified time, file size) are identical.

WIN32_FIND_DATA::dwReserved0 is only initialised in case of
FILE_ATTRIBUTE_REPARSE_POINT is set. This field is not a bit set. Check
corrected to only include all cloud reparse points and not other special
reparse points.

Signed-off-by: Dries Mys <dries.mys@my-dreams.be>