dedupe: Stop dedupe deleting files with identical IDs #4013
dedupe: Stop dedupe deleting files with identical IDs #4013

Before this change if there were two files with the same name and the
same ID in the same directory, dedupe would delete one of them but
since these are actually the same file (with the same ID) then both
files would be deleted leading to data loss.

This should never actually happen, however it did happen as part of a
bug introduced in rclone which was fixed by

dfc7215bf9b7840f drive: fix duplicate items when using --drive-shared-with-me #4018

This change checks to see if any of the duplicates have the same ID
and if they do it refuses to delete them.

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