[qmp-system] Migrate to new UCI network model (III)
On first boot call qmp_configure_smart_network() with force parameter,
and add to phydevs OpenWrt's default LAN and WAN interfaces, which may
not be detected as physical interfaces in some corner cases.
Fixes #489.
Signed-off-by:
Roger Pueyo Centelles <roger.pueyo@guifi.net>