osmux: Erase references to bsc-nat

Change-Id: I21ab7134de577278175132fc78431a249de76731
diff --git a/src/libosmo-mgcp/mgcp_msg.c b/src/libosmo-mgcp/mgcp_msg.c
index 4581b76..26a44c6 100644
--- a/src/libosmo-mgcp/mgcp_msg.c
+++ b/src/libosmo-mgcp/mgcp_msg.c
@@ -202,7 +202,7 @@
 		     osmux_cid, OSMUX_CID_MAX);
 		return -2;
 	}
-	LOGP(DLMGCP, LOGL_DEBUG, "bsc-nat offered Osmux CID %u\n", osmux_cid);
+	LOGP(DLMGCP, LOGL_DEBUG, "MGCP client offered Osmux CID %u\n", osmux_cid);
 
 	return osmux_cid;
 }