*: explicitly print "exit" at the end of every node config

There is a possibility that the same line can be matched as a command in
some node and its parent node. In this case, when reading the config,
this line is always executed as a command of the child node.

For example, with the following config:
```
router ospf
 network 193.168.0.0/16 area 0
!
mpls ldp
 discovery hello interval 111
!
```
Line `mpls ldp` is processed as command `mpls ldp-sync` inside the
`router ospf` node. This leads to a complete loss of `mpls ldp` node
configuration.

To eliminate this issue and all possible similar issues, let's print an
explicit "exit" at the end of every node config.

This commit also changes indentation for a couple of existing exit
commands so that all existing commands are on the same level as their
corresponding node-entering commands.

Fixes #9206.

Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/isisd/isis_cli.c b/isisd/isis_cli.c
index ef86d47b22..70ec66fd7f 100644
--- a/isisd/isis_cli.c
+++ b/isisd/isis_cli.c
@@ -146,6 +146,11 @@ void cli_show_router_isis(struct vty *vty, struct lyd_node *dnode,
 	vty_out(vty, "\n");
 }
 
+void cli_show_router_isis_end(struct vty *vty, struct lyd_node *dnode)
+{
+	vty_out(vty, "exit\n");
+}
+
 /*
  * XPath: /frr-interface:lib/interface/frr-isisd:isis/
  * XPath: /frr-interface:lib/interface/frr-isisd:isis/ipv4-routing