Rename parse_route_attributes to parse_update_subtlv.

This is consistent with Baptiste's work, and is better in any case.

message.c

@@ -120,7 +120,7 @@ network_prefix(int ae, int plen, unsigned int omitted,
 }
 
 static void
-parse_route_attributes(const unsigned char *a, int alen,
+parse_update_subtlv(const unsigned char *a, int alen,
                     unsigned char *channels)
 {
     int type, len, i = 0;
@@ -522,7 +522,7 @@ parse_packet(const unsigned char *from, struct interface *ifp,
             if((ifp->flags & IF_FARAWAY)) {
                 channels[0] = 0;
             } else {
-                /* This will be overwritten by parse_route_attributes below. */
+                /* This will be overwritten by parse_update_subtlv below. */
                 if(metric < 256) {
                     /* Assume non-interfering (wired) link. */
                     channels[0] = 0;
@@ -533,7 +533,7 @@ parse_packet(const unsigned char *from, struct interface *ifp,
                 }
 
                 if(parsed_len < len)
-                    parse_route_attributes(message + 2 + parsed_len,
+                    parse_update_subtlv(message + 2 + parsed_len,
                                         len - parsed_len, channels);
             }