Bug#755722: systemd must sync systemclock to RTC on shutdown

[Josh Triplett]

On Mon, 16 Feb 2015 16:41:21 +0100 Martin Pitt <mpitt at debian.org> wrote:
> For jessie+1/experimental onward, we'll fix this properly by enabling
> timesyncd by default. It won't start if ntp or similar are installed.
> This will make sure that the hw clock will be updated often enough,
> and we won't poke false data into it:
> 
>   http://anonscm.debian.org/cgit/pkg-systemd/systemd.git/commit/?h=experimental&id=929bece5326

Using ConditionFileIsExecutable on specific NTP daemons seems odd here.
Doesn't systemd already have a mechanism for choosing from multiple
alternative implementations of a given feature, automatically running
only one of them?  If not, perhaps it should; that same mechanism would
then work for display managers, web servers, etc.

- Josh Triplett