Merge "Remove X-Content-Dimensions header"

diff --combined RELEASE-NOTES-1.30
index cd800da,7595d23..6bdba84
--- 1/RELEASE-NOTES-1.30
--- 2/RELEASE-NOTES-1.30
+++ b/RELEASE-NOTES-1.30
@@@ -34,9 -34,6 +34,6 @@@ production
    ParserOptions::setWrapOutputClass().
  * Added 'ChangeTagsAllowedAdd' hook, enabling extensions to allow software-
    specific tags to be added by users.
- * File storage backends that supports headers (eg. Swift) now store an
-   X-Content-Dimensions header for originals that contain the media's dimensions
-   as page ranges keyed by dimensions.
  * Added a 'ParserOptionsRegister' hook to allow extensions to register
    additional parser options.
  
@@@ -99,13 -96,6 +96,13 @@@ changes to languages because of Phabric
    or wikilinks.
  * (T163966) Page moves are now counted as edits for the purposes of
    autopromotion, i.e., they increment the user_editcount field in the database.
 +* Two new hooks, LogEventsListLineEnding and NewPagesLineEnding were added for
 +  manipulating Special:Log and Special:NewPages lines.
 +* The OldChangesListRecentChangesLine, EnhancedChangesListModifyLineData,
 +  PageHistoryLineEnding, ContributionsLineEnding and DeletedContributionsLineEnding
 +  hooks have an additional parameter, for manipulating HTML data attributes of
 +  RC/history lines. EnhancedChangesListModifyBlockLineData can do that via the
 +  $data['attribs'] subarray.
  
  == Compatibility ==
  MediaWiki 1.30 requires PHP 5.5.9 or later. There is experimental support for