Log Message:
(mail/wl-snapshot) Updated 2.15.9.20190919 to 2.15.9.2023.08.18

- Convert Debian snapshot to github.com/wanderlust/
- This fixed the problem on Emacs 28.2
- ChangeLog.1 has the part of changes, but not listed here
- Not tested on Previous Emacs version yet
- Hoping to replace (rename) to mail/wl