Depend on firewalld to block all access by default, and require active involvement to open a port.
Rename and adjust init.d scripts.
* Rename init.d scripts first-run to freedombox-first-run and proxy to
  freedombox-client-proxy, to make it easier to see in /etc/init.d/
  which scripts belong to the freedombox setup.
* Adjust freedombox-first-run boot dependencies to run after
  firewalld, tor, haveged, lxc and pagekite, in case those are
  needed to set up the system.
Rename interface_detect to interface-detect, for more consistent naming with the other sbin tools in this package.
Rename setup.d/10_dreamplug to setup.d/10_hardware to better reflect its current task.