[master] 3ce0d377e ws functions are not part of vrt, so mark them

[Dridi Boukelmoune]

On Mon, Apr 8, 2019 at 3:45 PM Nils Goroll <nils.goroll at uplex.de> wrote:
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> commit 3ce0d377ed55cdb964cebf5d124c18d3c336576a
> Author: Nils Goroll <nils.goroll at uplex.de>
> Date:   Mon Apr 8 15:18:44 2019 +0200
>
>     ws functions are not part of vrt, so mark them
>
>     Yet having the changelog in one place is useful

I thought cache.h was part of VRT and cache_varnishd.h was strict ABI.