Add init script to osmocom-sgsn package.
diff --git a/openbsc/debian/osmocom-sgsn.default b/openbsc/debian/osmocom-sgsn.default
new file mode 100644
index 0000000..77c9679
--- /dev/null
+++ b/openbsc/debian/osmocom-sgsn.default
@@ -0,0 +1,2 @@
+CONFIG_FILE="/etc/osmocom/osmo-sgsn.cfg"
+