cosmetic: add spec reference

Related: OS#5579
Change-Id: I4d6bf9d0e681db779770b2fb815f7f9c5e608b15
---
M src/sua.c
1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/src/sua.c b/src/sua.c
index de69ab3..9e281e0 100644
--- a/src/sua.c
+++ b/src/sua.c
@@ -180,13 +180,15 @@
 	SUA_IEI_ROUTE_CTX, SUA_IEI_PROTO_CLASS, SUA_IEI_SRC_REF,
 	SUA_IEI_DEST_REF, 0
 };
+
+/* ITU-T Rec Q.713 */
 static const struct value_string sua_co_msgt_names[] = {
 	{ SUA_CO_CODT,		"CODT" },
 	{ SUA_CO_CODA,		"CODA" },
-	{ SUA_CO_CORE,		"CORE" },
-	{ SUA_CO_COAK,		"COAK" },
-	{ SUA_CO_COREF,		"COREF" },
-	{ SUA_CO_RELRE,		"RELRE" },
+	{ SUA_CO_CORE,		"CORE" },  /* §4.2 Connection request (CR) */
+	{ SUA_CO_COAK,		"COAK" },  /* §4.3 Connection confirm (CC) */
+	{ SUA_CO_COREF,		"COREF" }, /* §4.4 Connection refused (CREF) */
+	{ SUA_CO_RELRE,		"RELRE" }, /* §4.5 Released (RLSD) */
 	{ SUA_CO_RELCO,		"RELCO" },
 	{ SUA_CO_RESRE,		"RESRE" },
 	{ SUA_CO_RESCO,		"RESCO" },

