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Varnish in front of cgit with ESI diff fragments
================================================

Set "enable-esi=1" in cgitrc (see cgitrc(5), section EDGE SIDE INCLUDES),
then include cgit-esi.vcl from your VCL:

	vcl 4.1;
	backend cgit { .host = "127.0.0.1"; .port = "8080"; }
	include "/etc/varnish/cgit-esi.vcl";

The included file turns on ESI processing for the commit and diff frames,
hashes the esi-diff fragments on their query string so that all forks share
one rendering per commit, and refuses fragment requests that do not come
from the ESI processor.

cgit-esi.vtc exercises the VCL with a fake cgit backend:

	varnishtest -D cgit_vcl=$PWD/cgit-esi.vcl cgit-esi.vtc