Add legacy upgrade support

site.conf

@@ -124,4 +124,15 @@ Viel Spaß mit deinem Knoten und der Erkundung von Freifunk!
 </p>
 END
 	},
+
+	legacy => {
+	       version_files => ['/etc/.freifunk_version_keep', '/etc/.lff_version_keep'],
+	       old_files => ['/etc/config/config_mode', '/etc/config/ffhl', '/etc/config/freifunk'],
+
+	       config_mode_configs => ['config_mode.@wizard[0]', 'ffhl.@wizard[0]', 'freifunk.@wizard[0]'],
+	       fastd_configs => ['ffhl_mesh_vpn', 'mesh_vpn'],
+	       mesh_ifname => 'freifunk',
+	       tc_configs => ['ffhl.@bandwidth[0]', 'freifunk.@bandwidth[0]'],
+	       wifi_names => ['wifi_freifunk', 'wifi_freifunk5', 'wifi_mesh', 'wifi_mesh5'],
+	},
 }

site.mk

@@ -4,6 +4,7 @@ GLUON_SITE_PACKAGES := \
 	gluon-config-mode \
 	gluon-ebtables-filter-multicast \
 	gluon-ebtables-filter-ra-dhcp \
+	gluon-legacy \
 	gluon-luci-admin \
 	gluon-luci-autoupdater \
 	gluon-next-node \