Add CTRL interface

* add command to query Packet Services (GPRS etc.) for particular IMSI.
* add vty command to configure ctrl bind address
* add missing vty copyright notice

Change-Id: Id787ef4aa88473c3bbde6ee25117b1fd99dc8fcb
Related: OS#1645
diff --git a/src/hlr.h b/src/hlr.h
index 77751dd..1e8eff8 100644
--- a/src/hlr.h
+++ b/src/hlr.h
@@ -30,4 +30,8 @@
 
 	/* DB context */
 	struct db_context *dbc;
+
+	/* Control Interface */
+	struct ctrl_handle *ctrl;
+	const char *ctrl_bind_addr;
 };