Two things there. First, of course,
trust2 was the pool name used in that example, which probably isn't the same as yours. Second, there is an error in those commands, as they operate on the dataset name, not the filesystem path. The first two should read like this:
Code:
zfs snapshot -r trust2/pluginjail@relocate
zfs send -R trust2/pluginjail@relocate | zfs receive -v trust/pluginjail