apt lines:

	deb [arch=amd64] https://furmur.org/debian/bullseye bullseye main
	deb https://furmur.org/debian buster main
	deb https://furmur.org/debian stretch main

transport and key installation:

	# apt install apt-transport-https
	# wget -O - https://furmur.org/debian/key.gpg | apt-key add -

provided packages:

	https://github.com/furmur/yakuake
	https://github.com/yeti-switch/sems
	https://github.com/yeti-switch/sems-yeti