Nginx 1.11.5 发布了，改进如下：
移除IPv6配置选项，现在已支持IPv6自动配置
如果一个upstream中没有可用的服务器，Nginx不会像以前那样重置所有服务器的失败次数，但会等待
fail_timeout过期
特性和Bug修复：
Feature: the ngx_stream_ssl_preread_module.
Feature: the "server" directive in the "upstream" context supports the "max_conns" parameter.
Feature: the --with-compat configure option.
Feature: "manager_files", "manager_threshold", and "manager_sleep" parameters of the "proxy_cache_path", "fastcgi_cache_path", "scgi_cache_path", and "uwsgi_cache_path" directives.
Bugfix: flags passed by the --with-ld-opt configure option were not used while building perl module.
Bugfix: in the "add_after_body" directive when used with the "sub_filter" directive.
Bugfix: in the $realip_remote_addr variable.
Bugfix: the "dav_access", "proxy_store_access", "fastcgi_store_access", "scgi_store_access", and "uwsgi_store_access" directives ignored permissions specified for user.
Bugfix: unix domain listen sockets might not be inherited during binary upgrade on Linux.
Bugfix: nginx returned the 400 response on requests with the "-" character in the HTTP method.