Don't start or restart socket units on package upgrades
Don't start or restart socket units on package upgrades

Changes get picked up when the corresponding system unit being restartd.
This avoids problems when socket and service units of the same service get restarted
together. See #955483 for details.

agx/libvirt-debian,agx/libvirt-debian,agx/libvirt-debian,agx/libvirt-debian,agx/libvirt-debian