tree ac2416b0a3d2f2416e570cd3e1fe003f76185814
parent 7766c263f497bc1a8935fea9a00133de495be018
author Vladimir Homutov <vl@nginx.com> 1634281335 +0300
committer Vladimir Homutov <vl@nginx.com> 1634281335 +0300

HTTP/2: removed support for NPN.

NPN was replaced with ALPN, published as RFC 7301 in July 2014.
It used to negotiate SPDY (and, in transition, HTTP/2).

NPN supported appeared in OpenSSL 1.0.1. It does not work with TLSv1.3 [1].
ALPN is supported since OpenSSL 1.0.2.

The NPN support was dropped in Firefox 53 [2] and Chrome 51 [3].

[1] https://github.com/openssl/openssl/issues/3665.
[2] https://bugzilla.mozilla.org/show_bug.cgi?id=1248198
[3] https://www.chromestatus.com/feature/5767920709795840