TLSEXT_TYPE_application_layer_protocol_negotiation defined without implementation

[johansglock]

In the following commit TLSEXT_TYPE_application_layer_protocol_negotiation was added:
libressl/openbsd@9439a6a

This is included in LibreSSL 2.1.2 release without the ALPN implementation. Nginx uses this define to determine wether it should try to enable ALPN support as follows:

#ifdef TLSEXT_TYPE_application_layer_protocol_negotiation
    SSL_CTX_set_alpn_select_cb(conf->ssl.ctx, ngx_http_ssl_alpn_select, NULL);                                                                                                 
#endif

#ifdef TLSEXT_TYPE_next_proto_neg
    SSL_CTX_set_next_protos_advertised_cb(conf->ssl.ctx,
                                          ngx_http_ssl_npn_advertised, NULL);
#endif

Which breaks the build of course. In light of keeping keeping compatibility with software build for OpenSSL I would personally like to see that either this define is removed from the current release or perhaps do another minor update (as I saw that the ALPN implementation is being worked on) with the ALPN API available (if this is compatible).

What's the stand on this aspect from the developer team?

[busterb]

The rest of ALPN support was merged last week. We just need to roll a new release. Will probably do that in the next week or so. You can test in the mean time against git mirror HEAD if you like.