Specification:
- MediaTek MT7620A (580 Mhz)
- 64 MB of RAM
- 8 MB of FLASH
- 2T2R 2.4 GHz and 1T1R 5 GHz
- 5x 10/100 Mbps Ethernet
- 2x external, non-detachable antennas
- UART (J1) header on PCB (115200 8n1)
- 8x LED (GPIO-controlled*), 2x button, power input switch
- 1 x USB 2.0 port

WiFi driver is stable now.

The old bash-based parsing code was way too complex. Replace it with Lua.

For some reason, some of the target files were executable.

As the default package list is now handled using the 'packages' directive,
explicit wpad-mini removals in target definitions can be dropped.