Added support for configuring bconsole via bacula::console

Signed-off-by: Samuli Seppänen <samuli.seppanen@gmail.com>
Added notes about missing functionality in director and storagedaemon

- bacula::director is unable to grant proper privileges to the db tables
- bacula::storagedaemon does not manage the backup directory

Signed-off-by: Samuli Seppänen <samuli.seppanen@gmail.com>