Update to iana-etc-20240612.
Update to bc-6.7.6.
Update to man-pages-6.9.1.
Update to linux-6.9.7.
Update to sysklogd-2.5.2.
Update to shadow-4.16.0.
Update to systemd-256.1.
Update to setuptools-70.1.1.
Also change the formatting of options '-Dsomething' to '-D something'
"gcc(1)" is really not a file name.
Use <ulink> and link to the online man page on
https://man.archlinux.org/ so the user can refer to the man pages more
easily.
The change is done via a sed command and long lines are wrapped
manually.
