buster=eos;upgrade=bullseye,bookworm,trixie,testing
focal=csc;upgrade=jammy,noble,oracular
bullseye=csc;upgrade=bookworm,trixie,testing
bookworm=supported;upgrade=trixie,testing
jammy=supported;upgrade=noble,oracular
noble=supported;upgrade=oracular
trixie=csc;upgrade=testing
oracular=csc;upgrade=none
sid=csc;upgrade=none
