• Added a language matching subcondition (based on the Accept-Language header).
• Added support for custom MIME types for static file serving.
• Added support for dynamic content compression.
• Added support for HTTP/2-only (and gRPC over plain text) backend servers.
• Added support for sending PROXY protocol headers to backend servers when acting as a reverse proxy.
• Added support for setting constants inside conditions.
• Added support for specifying custom directory index files.
• Added support for using snippets inside conditions.
• Configuration validation and module loading error messages now also report in what block did the error occur.
• Corrected the configuration validation for cgi_interpreter directive.
• Fixed access logs wrongly written to global log files instead of host-specific ones.
• Fixed bug preventing some configuration properties in error_config blocks from being applied.
• The block and allow directives (used for access control) are no longer global-only.
• The server now disables HTTP/2 for backend servers when proxy_http2 directive is used, and the request contains Upgrade header.
• The server now removes Forwarded header before sending requests to backend servers as a reverse proxy.