gexiv2 FTBFS against exiv2-0.28 (reported by r1c0n3r0 on #lfs-support).
There is an upstream fix, but it does not apply to 0.14.0. So
update to 0.14.1 and add the patch.
The nautilus dependency was enabled by default to build the nautilus
extension, but in GNOME 43 (and 44) nautilus is GTK-4 while evince is
still GTK-3. The extension cannot be built properly with a GTK version
mismatch so the upstream has already disabled it.
So we can simply the instruction. Also remove a stale command
explanation referring to "configure script" (we are using meson now).
Simply the explanation for libkpathsea.so symlink in texlive too as we
don't distinguish "old" and "new" evince installations anymore. The
original explanation emphasizing "old" evince installation also does not
make sense to me: we have /etc/ld.so.conf addition which should be
enough for ld.so to find libkpathsea.so.6 when evince is used; and ld.so
only searches for "libkpathsea.so.6" (which is a DT_NEEDED entry in
evince libdvidocument.so), not unversioned libkpathsea.so.
On systemd, it uses libsystemd but it's already installed in LFS. On
sysv, we use -Dsystemd=false so libsystemd (a.k.a libelogind) not
needed.
But it invokes logind API via D-bus call (in js/ui/endSessionDialog.js),
so logind is a runtime dependency.
I cannot see how g-s-d needs systemd or elogind. The only reference to
systemd from g-s-d is through gnome-desktop (using
sd_pid_get_user_unit), which should be satisified by LFS systemd, and
useless with sysv.
Several packages add unneeded .desktop files in /usr/share/xsessions/.
These then show up in display managers and can confuse users.
This change moves them out of the way.
Also document that lxdm does not support wayland based desktop sessions.
