Merge "action=history should return 404 if there is no such page"

diff --combined RELEASE-NOTES-1.28
index 24aaa0d,812f309..8b7dced
--- 1/RELEASE-NOTES-1.28
--- 2/RELEASE-NOTES-1.28
+++ b/RELEASE-NOTES-1.28
@@@ -6,6 -6,7 +6,7 @@@ MediaWiki 1.28 is an alpha-quality bran
  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.
@@@ -65,16 -66,13 +66,17 @@@
  
  ==== Upgraded external libraries ====
  * Updated es5-shim from v4.1.5 to v4.5.8
 +* Updated composer/semver from v1.4.1 to v1.4.2
 +* Updated wikimedia/php-session-serializer from v1.0.3 to v1.0.4
  
  ==== New external libraries ====
 +* Added wikimedia/scoped-callback v1.0.0
 +* Added wikimedia/wait-condition-loop v1.0.1
  
  ==== 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