Merge pull request #16603 from benzea/benzea/special-app-slice

Use app.slice by default in user manager (and define special user slices)

diff --cc man/systemd.special.xml
Simple merge

diff --cc src/basic/special.h
Simple merge

diff --cc src/core/mount.c
Simple merge

diff --cc src/core/swap.c
Simple merge

diff --cc src/core/unit.c
Simple merge

diff --cc src/core/unit.h
Simple merge

diff --cc units/user/meson.build
index b2a599b6d8aa76cea4b6775d360c99850bda0446,744c1e7c5e9d6eff550d738b74322328475f7d52..337a92092dbed68be398822feeef0abb31cc2594
--- 1/units/user/meson.build
--- 2/units/user/meson.build
+++ b/units/user/meson.build
@@@ -1,6 -1,8 +1,8 @@@
 -# SPDX-License-Identifier: LGPL-2.1+
 +# SPDX-License-Identifier: LGPL-2.1-or-later
  
  units = [
+         'app.slice',
+         'background.slice',
          'basic.target',
          'bluetooth.target',
          'default.target',

diff --cc units/user/systemd-exit.service
Simple merge

diff --cc units/user/systemd-tmpfiles-clean.service
Simple merge