MT#55283 fix IPv6 XMLRPC callbacks

Address must be printed with [] if it's IPv6

Change-Id: I238a774c5fc2b9957b29a325f2c00eb02d840a4b
(cherry picked from commit 2acf5a6f85)

daemon/call.c

@@ -420,7 +420,7 @@ void kill_calls_timer(GSList *list, const char *url) {
 
 		if (url_prefix) {
 			snprintf(url_buf, sizeof(url_buf), "%s%s%s",
-					url_prefix, sockaddr_print_buf(cb_addr),
+					url_prefix, sockaddr_print_p_buf(cb_addr),
 					url_suffix);
 		}
 		else