App::daemon helps running an application as a daemon. the idea to prepend scripts with functions provided by this module to 'daemonize' it.

along with the common features offered by similar modules on cpan, it
* supports logging with log4perl: in background mode, it logs to a logfile. in
foreground mode, log messages go directly to the screen.
* detects if another instance is already running and ends itself
automatically in this case.
* shows with the 'status' command if an instance is already running and
which pid it has.