cosmetic: xua_snm: Add spec reference regarding no SSNM tx

Change-Id: I69912d5b7032c12e06648e5f5a700384182bb1f9
---
M src/xua_snm.c
1 file changed, 1 insertion(+), 1 deletion(-)


git pull ssh://gerrit.osmocom.org:29418/libosmo-sigtran refs/changes/05/42505/1

diff --git a/src/xua_snm.c b/src/xua_snm.c
index 916f6c3..c3a6cf8 100644
--- a/src/xua_snm.c
+++ b/src/xua_snm.c
@@ -236,7 +236,7 @@
 
 	/* inform remote ASPs via DUNA/DAVA */
 	llist_for_each_entry(asp, &s7i->asp_list, list) {
-		/* SSNM is only permitted for ASPs in ACTIVE state */
+		/* SSNM is only permitted for ASPs in ACTIVE state (RFC4666 4.3.1) */
 		if (!osmo_ss7_asp_active(asp))
 			continue;
 

