Merge branch 'master' into deploy

* master:
  ftpmaster-authorized_keys: usper now has ipv6
  ftpmaster-authorized_keys: remove franck.d.o
  tests: add test for control-suite version checks
  control-suite: copy added packages to buildd suites
  control-suite: allow equal versions when doing version checks
  tests: add reference output for buildd-testing-proposed-updates
  tests: add buildd queue for testing-proposed-updates
  tests: add check_all_suites to 0001-basic
  tests: add reference output for 2000-dinstall
  tests: compare c-s output with reference output
  Flake8 fixes
  Additional NBS query based on metatata (Closes: #933034)