Some manpages (e.g. emacs-lucid, gcc-doc, ganeti) cannot be rendered

[stapelberg]

Filing this issue for tracking. Not sure if there is one root cause or multiple.

The common thing between these packages is that their manpages are symlinks outside of their own package, e.g.:

% ls -l bullseye/emacs-lucid/
total 12
lrwxrwxrwx 1 manpages manpages   33 Mar 20  2021 emacs-lucid.1.en.gz -> aux/usr/share/man/man1/emacs.1.gz

For ganeti, we have documented this here already:

debiman/cmd/debiman/download.go

Line 246 in ed40386

// TODO(stapelberg): ganeti has an interesting twist: their manpages live outside of usr/share/man, and they only have symlinks. in this case, we should extract the file to aux/ and then mangle the symlink dest. problem: manpages actually are in a separate package (ganeti-2.15) and use an absolute symlink (/etc/ganeti/share), which is not shipped with the package.