[x] increase version number in release-tools version for the releases/19.12 branch to 19.11.90
[x] run increase_repos_version.sh in your local machine
[x] git: fetch and change to releases/19.12 branch in pkgapplications server
[x] cleanup artifacts from old releases (sources/* and versions/*)
[x] run update_l10n.sh in capona
[x] run pack_all.sh in capona
[x] copy tars and and signatures to proper location in milonia
[x] announce packages to release-team list, including changelog, hashes, and signature verification key
[x] copy versions/* to local machine, needed for tagging and create_log.sh
[x] run create_sources_inc > sources.inc on capona
[] run tag_all.sh in your local machine
[] run bash add_bugzilla_versions.sh in your local machine
[] more stuff