Changes with nginx 1.15.2 24 Jul 2018
*) Feature: the $ssl_preread_protocol variable in the
*) Feature: now when using the "reset_timedout_connection" directive
nginx will reset connections being closed with the 444 code.
*) Change: a logging level of the "http request", "https proxy request",
"unsupported protocol", and "version too low" SSL errors has been
lowered from "crit" to "info".
*) Bugfix: DNS requests were not resent if initial sending of a request
*) Bugfix: the "reuseport" parameter of the "listen" directive was
ignored if the number of worker processes was specified after the
*) Bugfix: when using OpenSSL 1.1.0 or newer it was not possible to
switch off "ssl_prefer_server_ciphers" in a virtual server if it was
switched on in the default server.
*) Bugfix: SSL session reuse with upstream servers did not work with the
TLS 1.3 protocol.
Changes with nginx 1.15.1 03 Jul 2018
*) Feature: the "random" directive inside the "upstream" block.
*) Feature: improved performance when using the "hash" and "ip_hash"
directives with the "zone" directive.
*) Feature: the "reuseport" parameter of the "listen" directive now uses
SO_REUSEPORT_LB on FreeBSD 12.
*) Bugfix: HTTP/2 server push did not work if SSL was terminated by a
proxy server in front of nginx.
*) Bugfix: the "tcp_nopush" directive was always used on backend
*) Bugfix: sending a disk-buffered request body to a gRPC backend might