ANNOUNCE: xfce4-session 4.21.0 released

[Gaël Bonithon]

xfce4-session 4.21.0 is now available for download from
  
  https://archive.xfce.org/src/xfce/xfce4-session/4.21/xfce4-session-4.21.0.tar.xz
  https://archive.xfce.org/src/xfce/xfce4-session/4.21/xfce4-session-4.21.0.tar.xz?sha1
  https://archive.xfce.org/src/xfce/xfce4-session/4.21/xfce4-session-4.21.0.tar.xz?sha256


What is xfce4-session?
======================

The Xfce session manager controls the loading of applications when Xfce
is started. It also handles logging out, shutting down, and rebooting.

Website: 
  https://docs.xfce.org/xfce/xfce4-session/start


Release notes for 4.21.0
========================
[Please note that this is a development release.]

- wayland: Use labwc's --session option if available
- wayland: Don't pass xfce4-session to the optional compositor cmdline
- build: Automate copyright year management
- build: Replace xdt-csource with glib-compile-resources
- build: Define xfce4 min version >= 4.18
- Replace deprecated exo with libxfce4ui 4.21.0
- scripts: Make xflock4 blocking again
- I18n: Update po/LINGUAS list
- startxfce4: Fix keyboard layout on wayland
- meson-build: Add missing HAVE_POLKIT flag
- meson-build: Add missing freebsd variant
- meson-build: Remove unnecessary check for gzip
- Add meson build
- scripts: Remove unused .in level in xinitrc
- build: Add missing checks for headers
- build: Fix wrong include guard
- build: Add missing check for sigprocmask
- autotools-build: Check for xfce4-dev-tools in configure.ac
- build: Add missing dep flags
- build: Get rid of maintainer mode where gdbus-codegen is used
- Improve Wayland support
- Translation Updates:
  Basque, Catalan, Danish, Hungarian, Portuguese (Brazil), Russian,
  Slovak, Ukrainian, Venetian, Vietnamese