Merge "Soft deprecate DeferredStringifier class"

diff --combined RELEASE-NOTES-1.31
index 24239fd,ce77d69..f2d0af4
--- 1/RELEASE-NOTES-1.31
--- 2/RELEASE-NOTES-1.31
+++ b/RELEASE-NOTES-1.31
@@@ -26,8 -26,6 +26,8 @@@ production
    default mode.
  * CACHE_ACCEL now only supports APC(u) or WinCache. XCache support was removed
    as upstream is inactive and has no plans to move to PHP 7.
 +* The old CategorizedRecentChanges feature, including its related configuration
 +  option $wgAllowCategorizedRecentChanges, has been removed.
  
  === New features in 1.31 ===
  * Wikimedia\Rdbms\IDatabase->select() and similar methods now support
@@@ -65,7 -63,6 +65,7 @@@
  * Updated wikimedia/running-stat from 1.1.0 to 1.2.0.
  * Updated wikimedia/wrappedstring from 2.2.0 to 2.3.0.
  * Updated mediawiki/at-ease from 1.1.0 to 1.2.0.
 +* Updated wikimedia/php-session-serializer from 1.0.4 to 1.0.5.
  * …
  
  ==== New external libraries ====
@@@ -237,6 -234,7 +237,7 @@@ changes to languages because of Phabric
    * CommentStore::insert
    * CommentStore::insertWithTemplate
  * The method ResourceLoaderModule::getPosition(), deprecated in 1.29, has been removed.
+ * The DeferredStringifier class is deprecated, use Message::listParam() instead.
  
  == Compatibility ==
  MediaWiki 1.31 requires PHP 5.5.9 or later. Although HHVM 3.18.5 or later is supported,