Add talloc context introspection via VTY

This requires libosmocore with Change-Id
I43fc42880b22294d83c565ae600ac65e4f38b30d or later.

Change-Id: I50eb1c5a28efbe4542e177ce3d0a236e75eecdd0
diff --git a/src/gprs/gb_proxy_main.c b/src/gprs/gb_proxy_main.c
index 9f9c605..6f62400 100644
--- a/src/gprs/gb_proxy_main.c
+++ b/src/gprs/gb_proxy_main.c
@@ -51,6 +51,7 @@
 #include <osmocom/vty/logging.h>
 #include <osmocom/vty/stats.h>
 #include <osmocom/vty/ports.h>
+#include <osmocom/vty/misc.h>
 
 #include "../../bscconfig.h"
 
@@ -256,6 +257,7 @@
 
 	tall_bsc_ctx = talloc_named_const(NULL, 0, "nsip_proxy");
 	msgb_talloc_ctx_init(tall_bsc_ctx, 0);
+	vty_info.tall_ctx = tall_bsc_ctx;
 
 	signal(SIGINT, &signal_handler);
 	signal(SIGTERM, &signal_handler);
@@ -269,6 +271,7 @@
 	vty_info.copyright = openbsc_copyright;
 	vty_init(&vty_info);
 	logging_vty_add_cmds(NULL);
+	osmo_talloc_vty_add_cmds();
 	osmo_stats_vty_add_cmds(&gprs_log_info);
 	gbproxy_vty_init();