vfs: vfscache: Fix renaming of items while they are being uploaded
vfs: vfscache: Fix renaming of items while they are being uploaded

Previous to the fix, if an item was being uploaded and it was renamed,
the upload would fail with missing checksum errors.

This change cancels any uploads in progress if the file is renamed.

ncw/rclone,ncw/rclone,ncw/rclone,ncw/rclone