Changes with nginx 1.13.9 20 Feb 2018 *) Feature: HTTP/2 server push support; the "http2_push" and "http2_push_preload" directives. *) Bugfix: "header already sent" alerts might appear in logs when using cache; the bug had appeared in 1.9.13. *) Bugfix: a segmentation fault might occur in a worker process if the "ssl_verify_client" directive was used and no SSL certificate was specified in a virtual server. *) Bugfix: in the ngx_http_v2_module. *) Bugfix: in the ngx_http_dav_module. -- Maxim Dounin http://nginx.org/