Bump to v0.2.39

Revert "Merge pull request #62 from genesis/28-varnish-vcl-cleanup"

aa9e83fc10428edaa21d9c0ba0f087764e46903b

This reverts commit aa9e83fc10428edaa21d9c0ba0f087764e46903b, reversing
changes made to 9753fa4c403b977f8a14dad7181915d184cf25b3.