gv_php unbuildable on Ubuntu 23.10
Steps to reproduce
Attempt to migrate to Ubuntu 23.10 based on the Ubuntu 23.04 Dockerfile.
Expected Behaviour
Graphviz can be built and tested.
Actual Behaviour
libargon2-dev is apparently unavailable on Ubuntu 23.10. Removing it from the Dockerfile reveals building gv_php expects to link against it.
OS Version
Ubuntu 23.10
Graphviz Version
N/A
Additional info
This is surprising as it looks to me like Ubuntu’s libargon2-dev is just being inherited from Debian, and this package is still present in Debian unstable. Furthermore pkgs.org agrees with the behaviour above (libargon2-dev being unavailable), but depending on by which path you reach https://packages.ubuntu.com/mantic/libargon2-dev you get a 500 error or otherwise a page indicating it is available: