document DefaultOOMPolicy

the `man systemd.service` say:
   Defaults to the setting DefaultOOMPolicy= in systemd-system.conf(5) is set to
but there is no such line in this config.
This is the default value I extracted from
   systemctl show --property=DefaultOOMPolicy

diff --git a/src/core/system.conf.in b/src/core/system.conf.in
index fa6fb690c7806a11348de5573089e1469e62f253..39b1c74ff9cad0c8c412e3dd0f564340e085988c 100644 (file)
--- a/src/core/system.conf.in
+++ b/src/core/system.conf.in
@@ -72,3 +72,4 @@
 #DefaultLimitNICE=
 #DefaultLimitRTPRIO=
 #DefaultLimitRTTIME=
+#DefaultOOMPolicy=stop