ss7_asp: Improve spec references of T(ack)

Change-Id: I9dafa424e68aaf16956a6a07b93bd1cff6671f46
---
M src/xua_asp_fsm.c
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/xua_asp_fsm.c b/src/xua_asp_fsm.c
index 596db45..f7117d3 100644
--- a/src/xua_asp_fsm.c
+++ b/src/xua_asp_fsm.c
@@ -44,7 +44,7 @@
  * *
  */
 
-/* According to RFC3868 Section 8 */
+/* According to SUA RFC3868 Section 8, M3UA RFC4666 Section 4.3.4.1 */
 #define XUA_T_ACK_SEC	2
 
 static const struct value_string xua_asp_event_names[] = {
@@ -88,7 +88,7 @@
 	/* routing context[s]: list of 32bit integers */
 	/* ACTIVE: traffic mode type, tid label, drn label ? */
 
-	struct {
+	struct { /* RFC3868 & RFC4666 timer T(ack) */
 		struct osmo_timer_list timer;
 		int out_event;
 	} t_ack;

