sleep: install default sleep.conf

Closes #11310.

meson.build

@@ -2396,6 +2396,9 @@ executable('systemd-sleep',
            install : true,
            install_dir : rootlibexecdir)
 
+install_data('src/sleep/sleep.conf',
+             install_dir : pkgsysconfdir)
+
 exe = executable('systemd-sysctl',
                  'src/sysctl/sysctl.c',
                  include_directories : includes,

src/sleep/sleep.conf

@@ -0,0 +1,25 @@
+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU Lesser General Public License as published by
+#  the Free Software Foundation; either version 2.1 of the License, or
+#  (at your option) any later version.
+#
+# Entries in this file show the compile time defaults.
+# You can change settings by editing this file.
+# Defaults can be restored by simply deleting this file.
+#
+# See systemd-sleep.conf(5) for details
+
+[Sleep]
+#AllowSuspend=yes
+#AllowHibernation=yes
+#AllowSuspendThenHibernate=yes
+#AllowHybridSleep=yes
+#SuspendMode=
+#SuspendState=mem standby freeze
+#HibernateMode=platform shutdown
+#HibernateState=disk
+#HybridSleepMode=suspend platform shutdown
+#HybridSleepState=disk
+#HibernateDelaySec=180min