restore, commit: Help += note that those tools are low-level

Suggessted by @jerome here: !19 (comment 129181)

Co-authored-with: Jérome Perrin <jerome@nexedi.com>
/reviewed-on !19
44 jobs for master in 0 seconds
Status Job ID Name Coverage
  External
failed Zodbtools.UnitTest-Master

00:00:36

passed Zodbtools.UnitTest-ZODB5

00:00:31

failed Zodbtools.UnitTest-Master

00:00:35

failed Zodbtools.UnitTest-Master

00:01:29

failed Zodbtools.UnitTest-Master

00:00:35

failed Zodbtools.UnitTest-Master

00:00:36

failed Zodbtools.UnitTest-Master

00:00:38

failed Zodbtools.UnitTest-Master

00:01:00

failed Zodbtools.UnitTest-Master

00:00:35

failed Zodbtools.UnitTest-Master

00:00:39

failed Zodbtools.UnitTest-Master

00:00:40

failed Zodbtools.UnitTest-Master

00:00:36

failed Zodbtools.UnitTest-Master

00:00:38

failed Zodbtools.UnitTest-Master

00:00:37

failed Zodbtools.UnitTest-Master

00:00:35

failed Zodbtools.UnitTest-Master

00:00:58

failed Zodbtools.UnitTest-Master

00:00:36

failed Zodbtools.UnitTest-Master

00:00:34

failed Zodbtools.UnitTest-Master

00:00:39

failed Zodbtools.UnitTest-Master

00:00:34

passed Zodbtools.UnitTest-ZODB5

00:00:33

passed Zodbtools.UnitTest-ZODB5

00:00:36

passed Zodbtools.UnitTest-ZODB5

00:00:31

passed Zodbtools.UnitTest-ZODB5

00:00:30

passed Zodbtools.UnitTest-ZODB5

00:00:32

passed Zodbtools.UnitTest-ZODB5

00:00:29

passed Zodbtools.UnitTest-ZODB5

00:00:31

passed Zodbtools.UnitTest-ZODB5

00:00:30

passed Zodbtools.UnitTest-ZODB5

00:00:31

passed Zodbtools.UnitTest-ZODB5

00:00:31

passed Zodbtools.UnitTest-ZODB5

00:00:30

passed Zodbtools.UnitTest-ZODB5

00:00:35

passed Zodbtools.UnitTest-ZODB5

00:00:34

passed Zodbtools.UnitTest-ZODB5

00:00:32

passed Zodbtools.UnitTest-ZODB5

00:00:33

passed Zodbtools.UnitTest-ZODB5

00:00:32

passed Zodbtools.UnitTest-ZODB5

00:00:30

passed Zodbtools.UnitTest-ZODB5

00:00:30

passed Zodbtools.UnitTest-ZODB5

00:00:30

passed Zodbtools.UnitTest-ZODB5

00:00:28

passed Zodbtools.UnitTest-ZODB5

00:00:30

passed Zodbtools.UnitTest-ZODB5

00:00:29

passed Zodbtools.UnitTest-ZODB5

00:00:33

passed Zodbtools.UnitTest-ZODB5

00:00:30