Merge "API: Have action=parse indicate hidden categories"

diff --combined RELEASE-NOTES-1.23
index 1ab3593,804ea43..710f26f
--- 1/RELEASE-NOTES-1.23
--- 2/RELEASE-NOTES-1.23
+++ b/RELEASE-NOTES-1.23
@@@ -18,8 -18,6 +18,8 @@@ production
    This capability can be enabled by setting $wgResourceLoaderStorageEnabled to
    true. This feature is currently considered experimental and should only be
    enabled with care.
 +* (bug 6092) Add expensive parser functions {{REVISIONID:}}, {{REVISIONUSER:}}
 +  and {{REVISIONTIMESTAMP:}} (with friends).
  
  === Bug fixes in 1.23 ===
  * (bug 41759) The "updated since last visit" markers (on history pages, recent
@@@ -28,6 -26,8 +28,8 @@@
    acting as if the latest revision was being viewed.
  
  === API changes in 1.23 ===
+ * (bug 54884) action=parse&prop=categories now indicates hidden and missing
+   categories.
  
  === Languages updated in 1.23===