# allready done
git clone https://git.kernel.org/pub/scm/linux/kernel/git/wens/wireless-regdb.git
##

nano db.txt
sudo apt install swig
pip3 install M2Crypto
make

# output:
Generating regulatory.bin digitally signed by apu...
./db2bin.py regulatory.bin db.txt ~/.wireless-regdb-apu.key.priv.pem
sha1sum db.txt > sha1sum.txt
Generating regulatory.db
./db2fw.py regulatory.db db.txt
Signing regulatory.db (by apu)...