gbproxy: Enable IP-SNS towards SGSN

Change-Id: Ia9cb646d57cd3bf77aebf60318e5f76599d516a5
diff --git a/gbproxy/osmo-gbproxy.cfg b/gbproxy/osmo-gbproxy.cfg
index a3148e2..5ce0dfc 100644
--- a/gbproxy/osmo-gbproxy.cfg
+++ b/gbproxy/osmo-gbproxy.cfg
@@ -12,7 +12,7 @@
   listen 127.0.0.1 23000
   accept-ipaccess
  nse 101
-  nsvc ipa local 127.0.0.1 7777 nsvci 101
+  ip-sns 127.0.0.1 7777
  timer tns-block 3
  timer tns-block-retries 3
  timer tns-reset 3