VTY: Add hlr node and bind ip field

With this patch the address osmo-hlr binds to can be changed to
something else than 0.0.0.0

Change-Id: I79f7a300480f308b21116dd14d1698be38725afd
diff --git a/src/hlr.h b/src/hlr.h
index 1e8eff8..f63bc2b 100644
--- a/src/hlr.h
+++ b/src/hlr.h
@@ -34,4 +34,7 @@
 	/* Control Interface */
 	struct ctrl_handle *ctrl;
 	const char *ctrl_bind_addr;
+
+	/* Local bind addr */
+	char *gsup_bind_addr;
 };