osmo-gbproxy: Transition to use of 'telnet_init_default'

Related: OS#5809
Change-Id: Ib76ab5df5d87112bf78effc4cd0939c57f30f46c
diff --git a/src/gb_proxy_main.c b/src/gb_proxy_main.c
index da69f9c..243c51f 100644
--- a/src/gb_proxy_main.c
+++ b/src/gb_proxy_main.c
@@ -334,8 +334,7 @@
 	}
 
 	/* start telnet after reading config for vty_get_bind_addr() */
-	rc = telnet_init_dynif(tall_sgsn_ctx, NULL,
-			       vty_get_bind_addr(), OSMO_VTY_PORT_GBPROXY);
+	rc = telnet_init_default(tall_sgsn_ctx, NULL, OSMO_VTY_PORT_GBPROXY);
 	if (rc < 0)
 		exit(1);