upstream (hs)
- https://github.com/systemd/systemd/pull/18621 # keep carrying this until CentOS is on kernel 5.8+
- https://github.com/systemd/systemd/pull/24087 # drop in next version

downstream (hs)
- remotes/origin/lower-bpftool-version-requirement

upstream (hs+fb)
- modified version of PR 18621 # technically downstream since we modify it but whatever
- https://github.com/systemd/systemd/pull/22426
- https://github.com/systemd/systemd/pull/21183
    - reverted one commit: "journal: Store entry timestamps as 32-bit offsets to the head entry"
