production.
=== Configuration changes in 1.28 ===
+* $wgSend404Code now affects status code of action=history if the page is not there.
* BREAKING CHANGE: $wgHTTPProxy is now *required* for all external requests
made by MediaWiki via a proxy. Relying on the http_proxy environment
variable is no longer supported.
==== Removed and replaced external libraries ====
=== Bug fixes in 1.28 ===
+* (T146496) action=history pages should return 404 HTTP error code if the page does not exist
* (T137264) SECURITY: XSS in unclosed internal links
* (T133147) SECURITY: Escape '<' and ']]>' in inline <style> blocks
* (T133147) SECURITY: Require login to preview user CSS pages