Bug#680293: update-rc.d manual: `update-rc.d remove name` works when `/etc/init.d/name` exists

[Dmitry Bogatov]

[2018-07-19 23:47] Richard Laager <rlaager at wiktel.com>
> On 07/14/2018 08:34 PM, Richard Laager wrote:
> > Purging ntp after installing ntpsec seems to be fairly common with
> > users. Accordingly, I'm raising the severity of this bug to important.
> 
> My current intention is to rename the service from ntp.service to
> ntpsec.service. Accordingly, I'm undoing my severity change here.

For what it worth, you may be interested virtual facilities
(/etc/insserv.conf). We could introduce new virtual dependency $ntp,
provided by either ntp or ntpsec package.