bug#22039: 'guix system reconfigure' must start/restart/stop services

[Ludovic Courtès]

address@hidden (Ludovic Courtès) skribis:

> Currently ‘guix system reconfigure’ doesn’t try to dynamically update
> the set of running services, which is a shame.
>
> A simple strategy would be to have it:
>
>   1. Stop and unregister services currently known to dmd that are
>      missing in the new configuration.
>
>   2. Load and start (if they have ‘auto-start?’) services that are in
>      the new configuration and currently unknown to dmd.
>
>   3. The rest is the most difficult part: dealing with services that
>      already exist but that have changed (see below.)

Commit 240b57f implements #1 and #2.

Ludo’.