1 Store here migration scripts, named
2 <nnn>-up-<any-text>.sql
3 handled as a sql script to be run against planetlab5, or
5 which is assumed to be a shell script and is run as is
7 Another assumption is that
8 * nnn-up- script will set subversion number to <nnn>
9 * nnn-down script will set subversion number to <nnn>-1
12 See the migration script in plc.d/db for how this is used