Squashed 'github.com/xcir/C81-VarnishCache-inline-C-VMOD-guidebook/' content from commit f9a5555

git-subtree-dir: github.com/xcir/C81-VarnishCache-inline-C-VMOD-guidebook
git-subtree-split: f9a5555e2ffb187568185982a9c55c73c4dbbcf4
Merge commit 'c4b0c4cb2b490831b044f9f677c9e189bf5a1c73' as 'github.com/xcir/C81-VarnishCache-inline-C-VMOD-guidebook'