misc: 19.08 new features

The full RELEASE.md diff is b610f2022c9f4e10a922e7b57c80ec77cd45d021

Change-Id: Ide6d85d41bdc836a03390a50ab94f6ebbaae0b28
Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com>
(cherry picked from commit 1c586de48cc76fc6eac50f5d87003e2a80aa43e7)
diff --git a/docs/featuresbyrelease/index.rst b/docs/featuresbyrelease/index.rst
index a937c6a..363e7d9 100644
--- a/docs/featuresbyrelease/index.rst
+++ b/docs/featuresbyrelease/index.rst
@@ -9,6 +9,7 @@
 .. toctree::

    :maxdepth: 1

 

+   vpp1908

    vpp1904

    vpp1901

    vpp18.10