ramips-mt76x8: add Xiaomi Mi Router 4C

Specifications:

- CPU: MediaTek MT7628AN (580MHz)
- Flash: 16MB
- RAM: 64MB DDR2
- 2.4 GHz: IEEE 802.11b/g/n with Integrated LNA and PA
- Antennas: 4x external single band antennas
- WAN: 1x 10/100M
- LAN: 2x 10/100M
- LEDs: 2x yellow/blue. Programmable (labelled as power on case)
                      - Non-programmable (shows WAN activity)
- Button: Reset

How to install:

1- Use OpenWRTInvasion to gain telnet and ftp access.
2- Push openwrt firmware to /tmp/ using ftp.
3- Connect to router using telnet. (IP: 192.168.31.1 -
   Username: root - No password)
4- Use command "mtd -r write /tmp/firmware.bin OS1" to flash into
   the router..
5- It takes around 2 minutes. After that router will restart itself
   to OpenWrt.

e16a45f258 iwinfo: update to latest Git HEAD
0c51b265bf iwinfo: update to latest Git HEAD
85cef1cf22 kernel: bump 5.4 to 5.4.128
e171d11f55 libusb: Fix parsing of descriptors for multi-configuration devices
3d62b5d5c6 base-files: fix /tmp/TZ when zoneinfo not installed
3047df2317 base-files: fix zoneinfo support
ab5010d170 exfat: update to 5.12.3
72d93c1ba4 realtek: Fix failsafe mode
7a5a247c1f base-files: failsafe: Remove the VLAN modifier from interface name
c0fdfd15fc base-files: failsafe: Fix IP configuration
98b1a6435f kernel: Backport patch to automatically bring up DSA master when opening user port
ec780bdb92 kernel-5.4: backport latest patches for wireguard
82c700de67 hostapd: fix handling of the channel utilization options
1247a6bb35 bcm4908: fix Ethernet broken state after interface restart
25daa921da bcm4908: add kmod-gpio-button-hotplug
74dbf3412b base-files: fix typo in config_generate MAC check
125deb4d78 base-files: set MAC for bridge ports (devices) instead of bridge itself
e410ef8389 hostapd: wolfssl: add RNG to EC key
f6d8c0cf2b wolfssl: always export wc_ecc_set_rng
56228e9393 ath79: don't autodetect AR8033 PHY capabilities
2e157714a8 build,json: fix generation with empty profiles
8add3e139c build: preserve profiles.json between builds

Multi-port interfaces are stored in the network config as an array using
the ports key.

Single LAN and WAN interfaces are now stored in the network configs
"device" key.

Replace occurences of ar71xx with ath79. Remove references of ar71xx
targets which are not relevant anymore.

These config changes are not necessary anymore, as it's now the default
behavior.

Ref: https://github.com/freifunk-gluon/gluon/pull/2235#issuecomment-859654947


Signed-off-by: David Bauer <mail@david-bauer.net>

All targets now use OpenWrt device abstraction. Thus, all targets now
can be built using a per-device RootFS.

Signed-off-by: David Bauer <mail@david-bauer.net>

Signed-off-by: David Bauer <mail@david-bauer.net>

The kernel build requires rsync.

ramips-mt76x8: add Xiaomi Mi Router 4A (100M Edition)

gluon-mesh-vpn-core: fix potential null pointer dereferences

gluon-mesh-vpn-tunneldigger: fix Lua mesh-vpn provider module location

read_stdout can return NULL and thus the return value need to be checked
prior to accessing it.

Signed-off-by: David Bauer <mail@david-bauer.net>