etc/cron.d/openerp_lhc_demo-restore

   1 MAILTO=root+cron+openerp_lhc_demo-restore
   2 # m h dom mon dow user command
   3 0 2 * * * root sv force-stop openerp_lhc_demo && dropdb -U postgres openerp_lhc_demo && createdb -U postgres -O openerp_lhc_demo -T openerp_lhc_demo_bak openerp_lhc_demo && sv start openerp_lhc_demo