* gnu/services/admin.scm (unattended-upgrade-configuration): Add reboot? field. When truthy, unattended upgrade will stop the shepherd root service, triggering a reboot. * doc/guix.texi (Unattended Upgrades): Document it. Change-Id: I0af659b3c318421b1a7baa94dde3dadacc1fa10d Signed-off-by: Ludovic Courtès <ludo@gnu.org>