[dev] new debian build instructions

Hi folks, I just noticed that the original ‘debian’ folder has been moved to ‘debianpkg’ (which is breaking our build), and that there’s a new set of instructions for building FRR.deb package. However, these new instructions (debianpkg/README.deb_build.md) are not working for me. Basically, we are missing a ‘changelog’ and (apparently) some other debian requirements. So a couple of questions: * Do you have any cheatsheet for non-debian experts? * Are (somewhat) drastic changes like this one expected in stable (3.0) branches? Was this discussed somewhere and i totally missed it? Thanks. /Rodny