- upgrade openwrt 19->21

- complete rework of internal network configuration to support DSA
- completely move from ad-hoc to 802.11s for meshing (more stable and more router support)
- add vlan meshing
- add wifi-roaming (light)
- add USB Tethering (for some routers with enough flash and memory)
- replace gateway tunnel (bmxd->ipip) to increase speed extremly
- rework communities (add support for "sub-communities" like Pirna)
- add new communities (Dresden, Nord-Ost, Nord-West, Sued-Ost, Sued-West, Pirna, Oberlausitz, Leipzig)
- add option to force ethernet port speed down to 100mbit/s
- add function to disable/enable backbone configuration in GUI
- add automatic port selection for bacckbone (info send by server)
- add better speedtest result display (gui)
- add colors to logs
- add option to control LEDs
- move wifi scan into background
- remove splash screen
- remove ddns
- add function to specifiy the time of nightly reboot or firmware auto update
- add minor firewall improvments (where backbone tunnels where created through freifunk network itself)
- bmxd (routing protocol deamon) improve switching from dead nodes to other
- improve loading speed for GUI
- sysinfo.json: add infos about wifi channel, wireguard.
- support more routers

changelog

fix sysinfo.json for Igle

wireguard: refresh registration before starting wg after node has cha…

…nged and key was newly generated

fix airtime interface after firmware upgrade, using old wireless inte…

…rface names/config

fix wifi band selection