preset: ship a minimal preset file upstream

This is useful so that distros have something to base their own policy
of. It also useful to make sure that minimal installs always get useful
configuration in place.

Makefile.am

@@ -509,6 +509,9 @@ dist_userunit_DATA = \
 nodist_userunit_DATA = \
 	units/user/systemd-exit.service
 
+dist_systempreset_DATA = \
+	system-preset/90-systemd.preset
+
 EXTRA_DIST += \
 	units/getty@.service.m4 \
 	units/serial-getty@.service.m4 \

system-preset/90-systemd.preset

@@ -0,0 +1,31 @@
+#  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.
+
+# These ones should be enabled by default, even if distributions
+# generally follow a default-off policy.
+
+enable remote-fs.target
+enable getty@.service
+enable systemd-readahead-*
+enable systemd-timesyncd.service
+enable systemd-networkd.service
+enable systemd-resolved.service
+
+disable console-getty.service
+disable console-shell.service
+disable debug-shell.service
+
+disable halt.target
+disable kexec.target
+disable poweroff.target
+disable reboot.target
+disable rescue.target
+
+disable syslog.socket
+
+disable systemd-journal-gatewayd.*
+disable systemd-networkd-wait-online.service

system-preset/Makefile

@@ -0,0 +1 @@
+../src/Makefile