Implement IuCS (large refactoring and addition)

osmo-nitb becomes osmo-msc
add DIUCS debug log constant
add iucs.[hc]
add msc vty, remove nitb vty
add libiudummy, to avoid linking Iu deps in tests
Use new msc_tx_dtap() instead of gsm0808_submit_dtap()
libmgcp: add mgcpgw client API
bridge calls via mgcpgw

Enable MSC specific CTRL commands, bsc_base_ctrl_cmds_install() still needs to
be split up.

Change-Id: I5b5b6a9678b458affa86800afb1ec726e66eed88
diff --git a/src/libvlr/vlr_lu_fsm.c b/src/libvlr/vlr_lu_fsm.c
index ae671c1..94bea56 100644
--- a/src/libvlr/vlr_lu_fsm.c
+++ b/src/libvlr/vlr_lu_fsm.c
@@ -783,6 +783,14 @@
 
 	OSMO_ASSERT(vsub);
 
+	if (lfp->is_utran) {
+		int rc;
+		rc = lfp->vlr->ops.tx_common_id(lfp->msc_conn_ref);
+		if (rc)
+			LOGPFSML(fi, LOGL_ERROR,
+				 "Error while sending Common ID (%d)\n", rc);
+	}
+
 	vsub->conf_by_radio_contact_ind = true;
 	/* Update LAI */
 	vsub->cgi.lai = lfp->new_lai;
@@ -1413,6 +1421,10 @@
 			(ciphering_required? "+Ciph" : " (no Ciph)")
 			: "");
 
+	if (is_utran && !authentication_required)
+		LOGPFSML(fi, LOGL_ERROR,
+			 "Authentication off on UTRAN network. Good luck.\n");
+
 	osmo_fsm_inst_dispatch(fi, VLR_ULA_E_UPDATE_LA, NULL);
 
 	return fi;