Nginx 1.15.11 官方更新日志：
http://nginx.org/en/CHANGES

Changes with nginx 1.15.11                                       09 Apr 2019

    *) Bugfix: in the "ssl_stapling_file" directive on Windows.


Changes with nginx 1.15.10                                       26 Mar 2019

    *) Change: when using a hostname in the "listen" directive nginx now
       creates listening sockets for all addresses the hostname resolves to
       (previously, only the first address was used).

    *) Feature: port ranges in the "listen" directive.

    *) Feature: loading of SSL certificates and secret keys from variables.

    *) Workaround: the $ssl_server_name variable might be empty when using
       OpenSSL 1.1.1.

    *) Bugfix: nginx/Windows could not be built with Visual Studio 2015 or
       newer; the bug had appeared in 1.15.9.


Changes with nginx 1.15.9                                        26 Feb 2019

    *) Feature: variables support in the "ssl_certificate" and
       "ssl_certificate_key" directives.

    *) Feature: the "poll" method is now available on Windows when using
       Windows Vista or newer.

    *) Bugfix: if the "select" method was used on Windows and an error
       occurred while establishing a backend connection, nginx waited for
       the connection establishment timeout to expire.

    *) Bugfix: the "proxy_upload_rate" and "proxy_download_rate" directives
       in the stream module worked incorrectly when proxying UDP datagrams.