starting a service if a subpackage is installed

[Bill Nottingham]

Patrice Dumas (pertusus at free.fr) said: 
> > Just rely on admin configuration, like is done for every other
> > service.
> 
> Not for all the services. Local system services are automatically
> enabled, like crond (and messagebus, lm_sensors...).

If fcron is the default, it can start by default. Otherwise, it
can be like syslog-ng.

> to do the same, but conditional on a package being installed. That way
> it is possible to have cronie started in the default case and fcron
> installed but activated by the admin (install cronie, fcron but not
> fcron-startup). Or no cronie but fcron started automatically (install
> fcron and fcron-startup).

If the admin can install a package, they can run a chkconfig command;
it's not hard.

Bill