cosmetic: clarify BSC's remote MSC data vs. OsmoMSC

Change-Id: I74dd2b3f935d39b8caa718e2c8a51cc81bddf1b9

openbsc/include/openbsc/osmo_msc_data.h

@@ -20,6 +20,10 @@
  *
  */
 
+/*
+ * NOTE: This is about a *remote* MSC for OsmoBSC and is not part of libmsc.
+ */
+
 #ifndef _OSMO_MSC_DATA_H
 #define _OSMO_MSC_DATA_H
 
@@ -43,6 +47,8 @@ enum {
 	MSC_CON_TYPE_LOCAL,
 };
 
+/*! /brief Information on a remote MSC for libbsc.
+ */
 struct osmo_msc_data {
 	struct llist_head entry;