Add a BUGBUG note.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@390639 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_dahdi.c

@@ -1554,6 +1554,7 @@ static int dahdi_devicestate(const char *data);
 static int dahdi_cc_callback(struct ast_channel *inbound, const char *dest, ast_cc_callback_fn callback);
 /* BUGBUG The DAHDI channel driver needs its own native bridge technology. */
+/* BUGBUG The transfer=yes option is broken for ISDN to push tromboned calls to the peer. */
 static struct ast_channel_tech dahdi_tech = {
 	.type = "DAHDI",
 	.description = tdesc,