With -l/--links a .rclonelink object is buffered in memory to become
the target of a symlink. The read was unbounded, so a hostile or
corrupt source serving a large .rclonelink object made rclone use that
much memory and then log the whole body in the resulting error.
A symlink target can never be longer than a path, so the read now stops
at 128 KiB and anything longer is refused without retrying.
Nick Craig-Wood
0be5c88394