osmux: Add connection and global rate counters

Change-Id: I200a4aa3908cac0ec729d980a66f3df7f55e4da7
diff --git a/src/libosmo-mgcp/mgcp_network.c b/src/libosmo-mgcp/mgcp_network.c
index dfbe4d3..d492563 100644
--- a/src/libosmo-mgcp/mgcp_network.c
+++ b/src/libosmo-mgcp/mgcp_network.c
@@ -70,7 +70,7 @@
 	rate_ctr_add(rate_ctr_group_get_ctr(mgw_stats, id), inc);
 }
 
-static void rtpconn_rate_ctr_inc(struct mgcp_conn_rtp *conn_rtp, struct mgcp_endpoint *endp, int id)
+void rtpconn_rate_ctr_inc(struct mgcp_conn_rtp *conn_rtp, struct mgcp_endpoint *endp, int id)
 {
 	rtpconn_rate_ctr_add(conn_rtp, endp, id, 1);
 }