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/Makefile.am b/src/Makefile.am
index c66f9e5..7e9e1dc 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -40,7 +40,7 @@
 
 # Programs
 SUBDIRS += \
-	osmo-nitb \
+	osmo-msc \
 	osmo-bsc_mgcp \
 	utils \
 	ipaccess \