[gprs] gb_proxy: More VTY 'show' information

The 'show gbproxy' now actually shows information about the Gb proxy
BTS peers, whereas 'show ns' shows information about existing NS links.
diff --git a/openbsc/src/gprs/gb_proxy_vty.c b/openbsc/src/gprs/gb_proxy_vty.c
index 16f6a1e..a40392b 100644
--- a/openbsc/src/gprs/gb_proxy_vty.c
+++ b/openbsc/src/gprs/gb_proxy_vty.c
@@ -70,8 +70,8 @@
 	return CMD_SUCCESS;
 }
 
-DEFUN(show_gbproxy, show_gbproxy_cmd, "show gbproxy",
-      SHOW_STR "Display information about the Gb proxy")
+DEFUN(show_ns, show_ns_cmd, "show ns",
+      SHOW_STR "Display information about the NS protocol")
 {
 	/* FIXME: iterate over list of NS-VC's and display their state */
 	struct gprs_ns_inst *nsi = g_cfg->nsi;
@@ -176,6 +176,7 @@
 
 int gbproxy_vty_init(void)
 {
+	install_element(VIEW_NODE, &show_ns_cmd);
 	install_element(VIEW_NODE, &show_gbproxy_cmd);
 
 	install_element(CONFIG_NODE, &cfg_gbproxy_cmd);