Earlier quoted context omitted.
Yes, Varnish does h2c so for HTTPS you will need something like 1.4 or later: https://hitch-tls.org/ Made by Varnish Software to provide a "browser-vendor-compliant" HTTP/2 stack.
Hmm... you guys sure have pretty thoroughly sanitized all references to Stud at this point in code, documentation, READMEs, etc. :-(
Both changes.rst and the man page explain where Hitch came from.
Hitch has seen significant changes since we forked stud 0.3.2, for example proper reload/sighup support, an improved configuration format, and OCSP stapling. Running it on a large scale (cert/ip -wise) also works better now.
If you're ever in our parts of the world, let us know and we'll buy you some beers/coffee/$beverage and tell you all about how your old project is doing.