babeld: 3 more timing statements in config text

This commit makes the following lines visible in running-config text,
when respective intervals are configured to non-default values:

* babel hello-interval
* babel update-interval
* babel resend-delay
diff --git a/babeld/babel_interface.c b/babeld/babel_interface.c
index 00d53bc..958b1b9 100644
--- a/babeld/babel_interface.c
+++ b/babeld/babel_interface.c
@@ -986,6 +986,16 @@
                 vty_out (vty, " babel split-horizon%s", VTY_NEWLINE);
                 write++;
             }
+            if (babel_ifp->hello_interval != BABEL_DEFAULT_HELLO_INTERVAL)
+            {
+                vty_out (vty, " babel hello-interval %u%s", babel_ifp->hello_interval, VTY_NEWLINE);
+                write++;
+            }
+            if (babel_ifp->update_interval != BABEL_DEFAULT_UPDATE_INTERVAL)
+            {
+                vty_out (vty, " babel update-interval %u%s", babel_ifp->update_interval, VTY_NEWLINE);
+                write++;
+            }
         }
         vty_out (vty, "!%s", VTY_NEWLINE);
         write++;
diff --git a/babeld/babel_main.c b/babeld/babel_main.c
index 0fcba74..003d746 100644
--- a/babeld/babel_main.c
+++ b/babeld/babel_main.c
@@ -521,7 +521,6 @@
             "vty port                = %d%s"
             "id                      = %s%s"
             "parasitic               = %s%s"
-            "resend-delay            = %d%s"
             "allow_duplicates        = %s%s"
             "kernel_metric           = %d%s",
             pidfile, VTY_NEWLINE,
@@ -536,7 +535,6 @@
             babel_vty_port, VTY_NEWLINE,
             format_eui64(myid), VTY_NEWLINE,
             format_bool(parasitic), VTY_NEWLINE,
-            resend_delay, VTY_NEWLINE,
             format_bool(allow_duplicates), VTY_NEWLINE,
             kernel_metric, VTY_NEWLINE);
 }
diff --git a/babeld/babeld.c b/babeld/babeld.c
index 9fea2e1..1ae3f04 100644
--- a/babeld/babeld.c
+++ b/babeld/babeld.c
@@ -102,6 +102,11 @@
     if (!babel_routing_process)
         return lines;
     vty_out (vty, "router babel%s", VTY_NEWLINE);
+    if (resend_delay != BABEL_DEFAULT_RESEND_DELAY)
+    {
+        vty_out (vty, " babel resend-delay %u%s", resend_delay, VTY_NEWLINE);
+        lines++;
+    }
     /* list enabled interfaces */
     lines = 1 + babel_enable_if_config_write (vty);
     /* list redistributed protocols */