Nginx 主线版 1.15.3 已发布，在该版本中，TLSv1.3 现在可以与 BoringSSL 一起使用，此外还包括一些其他的新增功能和 bug 修复。
- Feature: now TLSv1.3 can be used with BoringSSL.
- Feature: the “ssl_early_data” directive, currently available with BoringSSL.
- Feature: the “keepalive_timeout” and “keepalive_requests” directives in the “upstream” block.
- Bugfix: the ngx_http_dav_module did not truncate destination file when copying a file over an existing one with the COPY method.
- Bugfix: the ngx_http_dav_module used zero access rights on the destination file and did not preserve file modification time when moving a file between different file systems with the MOVE method.
- Bugfix: the ngx_http_dav_module used default access rights when copying a file with the COPY method.
- Workaround: some clients might not work when using HTTP/2; the bug had appeared in 1.13.5.
- Bugfix: nginx could not be built with LibreSSL 2.8.0.