Announcements missing 4.0.5, 4.1.8 and 5.1.3

[info+varnish at shee.org]

> Am 13.09.2017 um 16:13 schrieb Dridi Boukelmoune <dridi at varnish-software.com>:
> 
> Those were security releases, they had a security advisory instead of the usual announce.

Feels not so coherent but good to known, thanks.

--
Leon