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/include/openbsc/osmo_msc.h b/include/openbsc/osmo_msc.h
index 5a26b60..bc96f1d 100644
--- a/include/openbsc/osmo_msc.h
+++ b/include/openbsc/osmo_msc.h
@@ -56,7 +56,6 @@
 	MSC_CONN_REJECT = 1,
 };
 
-
 struct bsc_api *msc_bsc_api();
 
 int msc_create_conn_fsm(struct gsm_subscriber_connection *conn, const char *id);
@@ -64,6 +63,14 @@
 int msc_vlr_alloc(struct gsm_network *net);
 int msc_vlr_start(struct gsm_network *net);
 
+int msc_compl_l3(struct gsm_subscriber_connection *conn,
+		 struct msgb *msg, uint16_t chosen_channel);
+void msc_dtap(struct gsm_subscriber_connection *conn, uint8_t link_id,
+	      struct msgb *msg);
+void msc_cipher_mode_compl(struct gsm_subscriber_connection *conn,
+			   struct msgb *msg, uint8_t alg_id);
+void msc_rx_sec_mode_compl(struct gsm_subscriber_connection *conn);
+
 void msc_subscr_conn_init(void);
 bool msc_subscr_conn_is_accepted(struct gsm_subscriber_connection *conn);
 void msc_subscr_conn_communicating(struct gsm_subscriber_connection *conn);
@@ -80,4 +87,6 @@
 void _msc_subscr_conn_put(struct gsm_subscriber_connection *conn,
 			  const char *file, int line);
 
+void msc_stop_paging(struct vlr_subscr *vsub);
+
 #endif