Before this change, sometimes preallocate failed with EINTR which
rclone ignored.
Retrying the syscall is the correct thing to do and seems to make
preallocate 100% reliable.
Add --network-mode option to activate mounting as network drive without having to set volume prefix.
Add support for automatic drive letter assignment (not specific to network drive mounting).
Allow full network share unc path in --volname, which will also implicitely activate network drive mounting.
Allow full network share unc path as mountpoint, which will also implicitely activate network drive mounting, and the specified path will be used as volume prefix and the remote will be mounted on an automatically assigned drive letter instead.
Before this change we passed both lpOverlapped and lpBytesReturned as NULL.
> If lpOverlapped is NULL, lpBytesReturned cannot be NULL. Even when
> an operation produces no output data, and lpOutBuffer can be NULL,
> the DeviceIoControl function makes use of the variable pointed to by
> lpBytesReturned. After such an operation, the value of the variable
> is without meaning.
After this change we set lpBytesReturned to a valid pointer.
See: https://forum.rclone.org/t/errors-when-downloading-any-file-over-250mb-from-google-drive-windows-sparse-files/16889
Normally os.OpenFile under Windows does not allow renaming or deleting
open file handles. This package provides equivelents for os.OpenFile,
os.Open and os.Create which do allow that.
