gprs_ns2_vty: Re-introduce a 'show ns' command

In I157467d6a74d6109bc23521c978c5aac6d29fe50 we introduced a split
between 'show ns entities' and 'show ns binds'.  However, there is
at least one test case in osmo-sgsn.git which depends on 'show ns'
working.  So let's re-add it as a backwards compatible, hidden command.

Change-Id: I7571c6d82f7a712803d09d165abb6c7cb5ae2e5c
diff --git a/src/gb/gprs_ns2_vty.c b/src/gb/gprs_ns2_vty.c
index 97becf6..8b8a999 100644
--- a/src/gb/gprs_ns2_vty.c
+++ b/src/gb/gprs_ns2_vty.c
@@ -324,6 +324,17 @@
 	}
 }
 
+/* Backwards compatibility, among other things for the TestVTYGbproxy which expects
+ * 'show ns' to output something about binds */
+DEFUN_HIDDEN(show_ns, show_ns_cmd, "show ns",
+	SHOW_STR SHOW_NS_STR)
+{
+	dump_ns_entities(vty, vty_nsi, false, false);
+	dump_ns_bind(vty, vty_nsi, false);
+	return CMD_SUCCESS;
+}
+
+
 DEFUN(show_ns_binds, show_ns_binds_cmd, "show ns binds [stats]",
 	SHOW_STR SHOW_NS_STR
 	"Display information about the NS protocol binds\n"
@@ -802,6 +813,7 @@
 		return 0;
 	vty_elements_installed = true;
 
+	install_lib_element_ve(&show_ns_cmd);
 	install_lib_element_ve(&show_ns_binds_cmd);
 	install_lib_element_ve(&show_ns_entities_cmd);
 	install_lib_element_ve(&show_ns_pers_cmd);