Code:
lib
nghttp2_session_set_user_data() is added to set new user data to nghttp2_session.
nghttpx
The option --verify-client-tolerate-expired has been added, which makes nghttpx accept expired client certificate.
tls_client_not_before, and tls_client_not_after are now available to mruby scripting. They return NotBefore, and NotAfter of client certificate respectively.
https://nghttp2.org/blog/2018/02/27/nghttp2-v1-31-0/