Fix help option of contrib/oid2name and contrib/vacuumlo

When Who What
2018-08-28 12:44:43 Michael Paquier (michael-kun) Closed in commitfest 2018-09 with status: Committed
2018-08-22 02:24:10 Tatsuro Yamada (tatsuro_yamada) New status: Waiting on Author
2018-08-22 02:23:43 Tatsuro Yamada (tatsuro_yamada) Changed reviewers to Michael Paquier (michael-kun)
2018-08-22 02:23:43 Tatsuro Yamada (tatsuro_yamada) Changed authors to Tatsuro Yamada (tatsuro_yamada)
2018-08-22 02:23:43 Tatsuro Yamada (tatsuro_yamada) Changed committer to michael-kun
2018-08-22 02:19:41 Tatsuro Yamada (tatsuro_yamada) Attached mail thread c7e7f25c-1747-cd0f-9335-390bc97b2db5@lab.ntt.co.jp
2018-08-22 02:19:40 Tatsuro Yamada (tatsuro_yamada) Created patch record