gbproxy: Enable IP-SNS towards SGSN

Change-Id: Ia9cb646d57cd3bf77aebf60318e5f76599d516a5
diff --git a/gbproxy/osmo-gbproxy.fr.cfg b/gbproxy/osmo-gbproxy.fr.cfg
index bd94c5b..0898acc 100644
--- a/gbproxy/osmo-gbproxy.fr.cfg
+++ b/gbproxy/osmo-gbproxy.fr.cfg
@@ -34,7 +34,7 @@
  timer tns-alive 3
  timer tns-alive-retries 10
  nse 101
-  nsvc ipa local 127.0.0.1 7777 nsvci 101
+  ip-sns 127.0.0.1 7777
  nse 2001
   nsvc fr hdlcnet1 dlci 16 nsvci 1
   nsvc fr hdlcnet2 dlci 17 nsvci 2