Changes with nginx 1.15.4 25 Sep 2018
*) Feature: now the "ssl_early_data" directive can be used with OpenSSL.
*) Bugfix: in the ngx_http_uwsgi_module.
Thanks to Chris Caputo.
*) Bugfix: connections with some gRPC backends might not be cached when
using the "keepalive" directive.
*) Bugfix: a socket leak might occur when using the "error_page"
directive to redirect early request processing errors, notably errors
with code 400.
*) Bugfix: the "return" directive did not change the response code when
returning errors if the request was redirected by the "error_page"
*) Bugfix: standard error pages and responses of the
ngx_http_autoindex_module module used the "bgcolor" attribute, and
might be displayed incorrectly when using custom color settings in
Thanks to Nova DasSarma.
*) Change: the logging level of the "no suitable key share" and "no
suitable signature algorithm" SSL errors has been lowered from "crit"