upgrade-0.9: Check and clean keyring after rewriting it
upgrade-0.9: Check and clean keyring after rewriting it

- Vacuum and integrity-check the keyring database after rewriting it

cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr