Hiya,
We've done some work on an openssl fork [1] that has ESNI
support and on a curl fork [2] that uses that. It's early
days, but if anyone wants to try play with the build and
give us feedback that'd be great. There's a HOWTO at [3].
If you find any issues with that you'd like to raise then
please raise an issue at [1] or [2], or send mail.
Thanks,
Stephen.
[1]
https://github.com/sftcd/openssl/tree/master/esnistuff[2]
https://github.com/niallor/curl[3]
https://defo.ie/building-curl-openssl-with-esni.html