From: Hasso Tepper <hasso@estpak.ee>
Add the 'no interface' command to all the daemons and vtysh. now it's
possible to delete interface from routeing daemons as well only if it
doesn't exist in os.
http://hasso.linux.ee/zebra/ht-no_interface_fix.patch
diff --git a/ospfd/ospf_vty.c b/ospfd/ospf_vty.c
index 482ef6f..ed4b4fd 100644
--- a/ospfd/ospf_vty.c
+++ b/ospfd/ospf_vty.c
@@ -7377,6 +7377,7 @@
install_node (&interface_node, config_write_interface);
install_element (CONFIG_NODE, &interface_cmd);
+ install_element (CONFIG_NODE, &no_interface_cmd);
install_default (INTERFACE_NODE);
/* "description" commands. */